1080199901 has 4 divisors (see below), whose sum is σ = 1178399904. Its totient is φ = 981999900.

The previous prime is 1080199891. The next prime is 1080199909. The reversal of 1080199901 is 1099910801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1099910801 = 11 ⋅99991891.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1080199901 is a prime.

It is a super-2 number, since 2×1080199901² = 2333663652240819602, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1080199909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49099985 + ... + 49100006.

It is an arithmetic number, because the mean of its divisors is an integer number (294599976).

Almost surely, 2^1080199901 is an apocalyptic number.

1080199901 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1080199901 is a deficient number, since it is larger than the sum of its proper divisors (98200003).

1080199901 is an equidigital number, since it uses as much as digits as its factorization.

1080199901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98200002.

The product of its (nonzero) digits is 5832, while the sum is 38.

The square root of 1080199901 is about 32866.3947064475. The cubic root of 1080199901 is about 1026.0488651938.

The spelling of 1080199901 in words is "one billion, eighty million, one hundred ninety-nine thousand, nine hundred one".