2987663257 has 8 divisors (see below), whose sum is σ = 3010818312. Its totient is φ = 2964528000.

The previous prime is 2987663251. The next prime is 2987663281. The reversal of 2987663257 is 7523667892.

It can be written as a sum of positive squares in 4 ways, for example, as 319837456 + 2667825801 = 17884^2 + 51651^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2987663257 is a prime.

It is a super-2 number, since 2×2987663257² = 17852263474455696098, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2987663198 and 2987663207.

It is not an unprimeable number, because it can be changed into a prime (2987663251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471007 + ... + 477307.

It is an arithmetic number, because the mean of its divisors is an integer number (376352289).

Almost surely, 2^2987663257 is an apocalyptic number.

It is an amenable number.

2987663257 is a deficient number, since it is larger than the sum of its proper divisors (23155055).

2987663257 is a wasteful number, since it uses less digits than its factorization.

2987663257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9899.

The product of its digits is 7620480, while the sum is 55.

The square root of 2987663257 is about 54659.5211925608. The cubic root of 2987663257 is about 1440.2698917028.

The spelling of 2987663257 in words is "two billion, nine hundred eighty-seven million, six hundred sixty-three thousand, two hundred fifty-seven".