2897634989 has 4 divisors (see below), whose sum is σ = 3068084124. Its totient is φ = 2727185856.

The previous prime is 2897634977. The next prime is 2897634997. The reversal of 2897634989 is 9894367982.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2671132489 + 226502500 = 51683^2 + 15050^2 .

It is a cyclic number.

It is not a de Polignac number, because 2897634989 - 2¹⁶ = 2897569453 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 (2897634959) 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, 85224542 + ... + 85224575.

It is an arithmetic number, because the mean of its divisors is an integer number (767021031).

Almost surely, 2^2897634989 is an apocalyptic number.

It is an amenable number.

2897634989 is a deficient number, since it is larger than the sum of its proper divisors (170449135).

2897634989 is a wasteful number, since it uses less digits than its factorization.

2897634989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170449134.

The product of its digits is 47029248, while the sum is 65.

The square root of 2897634989 is about 53829.6850167266. The cubic root of 2897634989 is about 1425.6553856532.

The spelling of 2897634989 in words is "two billion, eight hundred ninety-seven million, six hundred thirty-four thousand, nine hundred eighty-nine".