2987917257 has 32 divisors (see below), whose sum is σ = 4520857600. Its totient is φ = 1740128832.

The previous prime is 2987917201. The next prime is 2987917267. The reversal of 2987917257 is 7527197892.

It is not a de Polignac number, because 2987917257 - 2⁸ = 2987917001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2987917197 and 2987917206.

It is not an unprimeable number, because it can be changed into a prime (2987917267) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1097544 + ... + 1100262.

It is an arithmetic number, because the mean of its divisors is an integer number (141276800).

Almost surely, 2^2987917257 is an apocalyptic number.

It is an amenable number.

2987917257 is a deficient number, since it is larger than the sum of its proper divisors (1532940343).

2987917257 is a wasteful number, since it uses less digits than its factorization.

2987917257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4237.

The product of its digits is 4445280, while the sum is 57.

The square root of 2987917257 is about 54661.8446176124. The cubic root of 2987917257 is about 1440.3107060064.

The spelling of 2987917257 in words is "two billion, nine hundred eighty-seven million, nine hundred seventeen thousand, two hundred fifty-seven".