5131989497 has 4 divisors (see below), whose sum is σ = 5136263796. Its totient is φ = 5127715200.

The previous prime is 5131989493. The next prime is 5131989539. The reversal of 5131989497 is 7949891315.

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 613998841 + 4517990656 = 24779^2 + 67216^2 .

It is a cyclic number.

It is not a de Polignac number, because 5131989497 - 2² = 5131989493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5131989491) 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, 2135348 + ... + 2137749.

It is an arithmetic number, because the mean of its divisors is an integer number (1284065949).

Almost surely, 2^5131989497 is an apocalyptic number.

It is an amenable number.

5131989497 is a deficient number, since it is larger than the sum of its proper divisors (4274299).

5131989497 is a wasteful number, since it uses less digits than its factorization.

5131989497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4274298.

The product of its digits is 2449440, while the sum is 56.

The square root of 5131989497 is about 71637.9054481634. The cubic root of 5131989497 is about 1724.8920463983.

The spelling of 5131989497 in words is "five billion, one hundred thirty-one million, nine hundred eighty-nine thousand, four hundred ninety-seven".