2977893021 has 4 divisors (see below), whose sum is σ = 3970524032. Its totient is φ = 1985262012.

The previous prime is 2977893019. The next prime is 2977893029. The reversal of 2977893021 is 1203987792.

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 not a de Polignac number, because 2977893021 - 2¹ = 2977893019 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 (2977893029) 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, 496315501 + ... + 496315506.

It is an arithmetic number, because the mean of its divisors is an integer number (992631008).

Almost surely, 2^2977893021 is an apocalyptic number.

It is an amenable number.

2977893021 is a deficient number, since it is larger than the sum of its proper divisors (992631011).

2977893021 is an equidigital number, since it uses as much as digits as its factorization.

2977893021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992631010.

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 2977893021 is about 54570.0744089652. The cubic root of 2977893021 is about 1438.6981902754.

The spelling of 2977893021 in words is "two billion, nine hundred seventy-seven million, eight hundred ninety-three thousand, twenty-one".