2897979521 has 4 divisors (see below), whose sum is σ = 2945487444. Its totient is φ = 2850471600.

The previous prime is 2897979509. The next prime is 2897979593. The reversal of 2897979521 is 1259797982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1259797982 = 2 ⋅629898991.

It can be written as a sum of positive squares in 2 ways, for example, as 163840000 + 2734139521 = 12800^2 + 52289^2 .

It is a cyclic number.

It is not a de Polignac number, because 2897979521 - 2⁶ = 2897979457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2897978521) 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, 23753870 + ... + 23753991.

It is an arithmetic number, because the mean of its divisors is an integer number (736371861).

Almost surely, 2^2897979521 is an apocalyptic number.

It is an amenable number.

2897979521 is a deficient number, since it is larger than the sum of its proper divisors (47507923).

2897979521 is an equidigital number, since it uses as much as digits as its factorization.

2897979521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47507922.

The product of its digits is 5715360, while the sum is 59.

The square root of 2897979521 is about 53832.8851261011. The cubic root of 2897979521 is about 1425.7118874138.

The spelling of 2897979521 in words is "two billion, eight hundred ninety-seven million, nine hundred seventy-nine thousand, five hundred twenty-one".