8731390537 has 2 divisors, whose sum is σ = 8731390538. Its totient is φ = 8731390536.

The previous prime is 8731390517. The next prime is 8731390583. The reversal of 8731390537 is 7350931378.

It is the 38148-th star number.

It is an a-pointer prime, because the next prime (8731390583) can be obtained adding 8731390537 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8518551616 + 212838921 = 92296^2 + 14589^2 .

It is a cyclic number.

It is not a de Polignac number, because 8731390537 - 2²⁷ = 8597172809 is a prime.

It is a super-2 number, since 2×8731390537² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8731390517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4365695268 + 4365695269.

It is an arithmetic number, because the mean of its divisors is an integer number (4365695269).

Almost surely, 2^8731390537 is an apocalyptic number.

It is an amenable number.

8731390537 is a deficient number, since it is larger than the sum of its proper divisors (1).

8731390537 is an equidigital number, since it uses as much as digits as its factorization.

8731390537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 476280, while the sum is 46.

The square root of 8731390537 is about 93441.9099601458. The cubic root of 8731390537 is about 2059.1807576738.

The spelling of 8731390537 in words is "eight billion, seven hundred thirty-one million, three hundred ninety thousand, five hundred thirty-seven".