901088891 has 4 divisors (see below), whose sum is σ = 901567800. Its totient is φ = 900609984.

The previous prime is 901088879. The next prime is 901088897. The reversal of 901088891 is 198880109.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 901088891 - 2⁶ = 901088827 is a prime.

It is a super-2 number, since 2×901088891² = 1623922378967219762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (901088897) 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, 236621 + ... + 240398.

It is an arithmetic number, because the mean of its divisors is an integer number (225391950).

Almost surely, 2^901088891 is an apocalyptic number.

901088891 is a deficient number, since it is larger than the sum of its proper divisors (478909).

901088891 is a wasteful number, since it uses less digits than its factorization.

901088891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478908.

The product of its (nonzero) digits is 41472, while the sum is 44.

The square root of 901088891 is about 30018.1426973755. The cubic root of 901088891 is about 965.8786027535.

The spelling of 901088891 in words is "nine hundred one million, eighty-eight thousand, eight hundred ninety-one".