1230101989 has 4 divisors (see below), whose sum is σ = 1258709056. Its totient is φ = 1201494924.

The previous prime is 1230101987. The next prime is 1230101993. The reversal of 1230101989 is 9891010321.

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.

It is a cyclic number.

It is not a de Polignac number, because 1230101989 - 2¹ = 1230101987 is a prime.

It is a super-2 number, since 2×1230101989² = 3026301806683512242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230101987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14303469 + ... + 14303554.

It is an arithmetic number, because the mean of its divisors is an integer number (314677264).

Almost surely, 2^1230101989 is an apocalyptic number.

It is an amenable number.

1230101989 is a deficient number, since it is larger than the sum of its proper divisors (28607067).

1230101989 is an equidigital number, since it uses as much as digits as its factorization.

1230101989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28607066.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 1230101989 is about 35072.8098247061. The cubic root of 1230101989 is about 1071.4708827541.

The spelling of 1230101989 in words is "one billion, two hundred thirty million, one hundred one thousand, nine hundred eighty-nine".