1901099 has 4 divisors (see below), whose sum is σ = 1904136. Its totient is φ = 1898064.

The previous prime is 1901089. The next prime is 1901117. The reversal of 1901099 is 9901091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9901091 = 401 ⋅24691.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1901099 is a prime.

It is a super-2 number, since 2×1901099² = 7228354815602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1901089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194 + ... + 1959.

It is an arithmetic number, because the mean of its divisors is an integer number (476034).

2^1901099 is an apocalyptic number.

1901099 is a deficient number, since it is larger than the sum of its proper divisors (3037).

1901099 is an equidigital number, since it uses as much as digits as its factorization.

1901099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3036.

The product of its (nonzero) digits is 729, while the sum is 29.

The square root of 1901099 is about 1378.8034667784. The cubic root of 1901099 is about 123.8801087111.

The spelling of 1901099 in words is "one million, nine hundred one thousand, ninety-nine".