5257023887 has 4 divisors (see below), whose sum is σ = 5257249176. Its totient is φ = 5256798600.

The previous prime is 5257023851. The next prime is 5257023929. The reversal of 5257023887 is 7883207525.

It is a happy number.

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 5257023887 - 2²² = 5252829583 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 (5257023817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72989 + ... + 125862.

It is an arithmetic number, because the mean of its divisors is an integer number (1314312294).

Almost surely, 2^5257023887 is an apocalyptic number.

5257023887 is a deficient number, since it is larger than the sum of its proper divisors (225289).

5257023887 is a wasteful number, since it uses less digits than its factorization.

5257023887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225288.

The product of its (nonzero) digits is 940800, while the sum is 47.

The square root of 5257023887 is about 72505.3369552890. The cubic root of 5257023887 is about 1738.7880633388.

The spelling of 5257023887 in words is "five billion, two hundred fifty-seven million, twenty-three thousand, eight hundred eighty-seven".