2517397987 has 8 divisors (see below), whose sum is σ = 2712238704. Its totient is φ = 2322727968.

The previous prime is 2517397979. The next prime is 2517397999. The reversal of 2517397987 is 7897937152.

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

It is a cyclic number.

It is not a de Polignac number, because 2517397987 - 2³ = 2517397979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2517397907) 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, 11173 + ... + 71830.

It is an arithmetic number, because the mean of its divisors is an integer number (339029838).

Almost surely, 2^2517397987 is an apocalyptic number.

2517397987 is a deficient number, since it is larger than the sum of its proper divisors (194840717).

2517397987 is a wasteful number, since it uses less digits than its factorization.

2517397987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85349.

The product of its digits is 6667920, while the sum is 58.

The square root of 2517397987 is about 50173.6782287287. The cubic root of 2517397987 is about 1360.3498932133.

The spelling of 2517397987 in words is "two billion, five hundred seventeen million, three hundred ninety-seven thousand, nine hundred eighty-seven".