902396991 has 4 divisors (see below), whose sum is σ = 1203195992. Its totient is φ = 601597992.

The previous prime is 902396987. The next prime is 902397029. The reversal of 902396991 is 199693209.

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

It is not a de Polignac number, because 902396991 - 2² = 902396987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 902396991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (902396491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150399496 + ... + 150399501.

It is an arithmetic number, because the mean of its divisors is an integer number (300798998).

Almost surely, 2^902396991 is an apocalyptic number.

902396991 is a deficient number, since it is larger than the sum of its proper divisors (300799001).

902396991 is a wasteful number, since it uses less digits than its factorization.

902396991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300799000.

The product of its (nonzero) digits is 236196, while the sum is 48.

The square root of 902396991 is about 30039.9232855212. The cubic root of 902396991 is about 966.3457615874.

The spelling of 902396991 in words is "nine hundred two million, three hundred ninety-six thousand, nine hundred ninety-one".