86631587293 has 2 divisors, whose sum is σ = 86631587294. Its totient is φ = 86631587292.

The previous prime is 86631587249. The next prime is 86631587299. The reversal of 86631587293 is 39278513668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66140523684 + 20491063609 = 257178^2 + 143147^2 .

It is a cyclic number.

It is not a de Polignac number, because 86631587293 - 2¹³ = 86631579101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86631587299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43315793646 + 43315793647.

It is an arithmetic number, because the mean of its divisors is an integer number (43315793647).

Almost surely, 2^86631587293 is an apocalyptic number.

It is an amenable number.

86631587293 is a deficient number, since it is larger than the sum of its proper divisors (1).

86631587293 is an equidigital number, since it uses as much as digits as its factorization.

86631587293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13063680, while the sum is 58.

The spelling of 86631587293 in words is "eighty-six billion, six hundred thirty-one million, five hundred eighty-seven thousand, two hundred ninety-three".