5187993157 has 4 divisors (see below), whose sum is σ = 5191478860. Its totient is φ = 5184507456.

The previous prime is 5187993143. The next prime is 5187993199. The reversal of 5187993157 is 7513997815.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1233344161 + 3954648996 = 35119^2 + 62886^2 .

It is a cyclic number.

It is not a de Polignac number, because 5187993157 - 2¹⁵ = 5187960389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5187993098 and 5187993107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5187993257) 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, 1740618 + ... + 1743595.

It is an arithmetic number, because the mean of its divisors is an integer number (1297869715).

Almost surely, 2^5187993157 is an apocalyptic number.

It is an amenable number.

5187993157 is a deficient number, since it is larger than the sum of its proper divisors (3485703).

5187993157 is a wasteful number, since it uses less digits than its factorization.

5187993157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3485702.

The product of its digits is 2381400, while the sum is 55.

The square root of 5187993157 is about 72027.7249189505. The cubic root of 5187993157 is about 1731.1437475538.

The spelling of 5187993157 in words is "five billion, one hundred eighty-seven million, nine hundred ninety-three thousand, one hundred fifty-seven".