2902945621 has 4 divisors (see below), whose sum is σ = 3029160672. Its totient is φ = 2776730572.

The previous prime is 2902945601. The next prime is 2902945657. The reversal of 2902945621 is 1265492092.

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 a de Polignac number, because none of the positive numbers 2^k-2902945621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2902945601) 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, 63107491 + ... + 63107536.

It is an arithmetic number, because the mean of its divisors is an integer number (757290168).

Almost surely, 2^2902945621 is an apocalyptic number.

It is an amenable number.

2902945621 is a deficient number, since it is larger than the sum of its proper divisors (126215051).

2902945621 is a wasteful number, since it uses less digits than its factorization.

2902945621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126215050.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 2902945621 is about 53878.9905343446. The cubic root of 2902945621 is about 1426.5258093518.

The spelling of 2902945621 in words is "two billion, nine hundred two million, nine hundred forty-five thousand, six hundred twenty-one".