902249091 has 32 divisors (see below), whose sum is σ = 1371152640. Its totient is φ = 586051200.

The previous prime is 902249071. The next prime is 902249111. The reversal of 902249091 is 190942209.

It is an interprime number because it is at equal distance from previous prime (902249071) and next prime (902249111).

It is not a de Polignac number, because 902249091 - 2⁹ = 902248579 is a prime.

It is a super-5 number, since 5×902249091⁵ (a number of 46 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (902249011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 662251 + ... + 663611.

It is an arithmetic number, because the mean of its divisors is an integer number (42848520).

Almost surely, 2^902249091 is an apocalyptic number.

902249091 is a deficient number, since it is larger than the sum of its proper divisors (468903549).

902249091 is a wasteful number, since it uses less digits than its factorization.

902249091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984 (or 1978 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 902249091 is about 30037.4614606494. The cubic root of 902249091 is about 966.2929650362.

The spelling of 902249091 in words is "nine hundred two million, two hundred forty-nine thousand, ninety-one".