80902649 has 4 divisors (see below), whose sum is σ = 81387264. Its totient is φ = 80418036.

The previous prime is 80902597. The next prime is 80902667. The reversal of 80902649 is 94620908.

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 80902649 - 2¹² = 80898553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80902669) 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, 242057 + ... + 242390.

It is an arithmetic number, because the mean of its divisors is an integer number (20346816).

Almost surely, 2^80902649 is an apocalyptic number.

It is an amenable number.

80902649 is a deficient number, since it is larger than the sum of its proper divisors (484615).

80902649 is a wasteful number, since it uses less digits than its factorization.

80902649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484614.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 80902649 is about 8994.5899850966. The cubic root of 80902649 is about 432.5014627903.

The spelling of 80902649 in words is "eighty million, nine hundred two thousand, six hundred forty-nine".