249872585387 has 4 divisors (see below), whose sum is σ = 250909401336. Its totient is φ = 248835769440.

The previous prime is 249872585383. The next prime is 249872585449. The reversal of 249872585387 is 783585278942.

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

It is a cyclic number.

It is not a de Polignac number, because 249872585387 - 2² = 249872585383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249872585381) 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, 518407613 + ... + 518408094.

It is an arithmetic number, because the mean of its divisors is an integer number (62727350334).

Almost surely, 2^249872585387 is an apocalyptic number.

249872585387 is a deficient number, since it is larger than the sum of its proper divisors (1036815949).

249872585387 is a wasteful number, since it uses less digits than its factorization.

249872585387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036815948.

The product of its digits is 270950400, while the sum is 68.

The spelling of 249872585387 in words is "two hundred forty-nine billion, eight hundred seventy-two million, five hundred eighty-five thousand, three hundred eighty-seven".