31987674461 has 2 divisors, whose sum is σ = 31987674462. Its totient is φ = 31987674460.

The previous prime is 31987674443. The next prime is 31987674469. The reversal of 31987674461 is 16447678913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30649504900 + 1338169561 = 175070^2 + 36581^2 .

It is a cyclic number.

It is not a de Polignac number, because 31987674461 - 2²² = 31983480157 is a prime.

It is a super-2 number, since 2×31987674461² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31987674397 and 31987674406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31987674469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15993837230 + 15993837231.

It is an arithmetic number, because the mean of its divisors is an integer number (15993837231).

Almost surely, 2^31987674461 is an apocalyptic number.

It is an amenable number.

31987674461 is a deficient number, since it is larger than the sum of its proper divisors (1).

31987674461 is an equidigital number, since it uses as much as digits as its factorization.

31987674461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 56.

The spelling of 31987674461 in words is "thirty-one billion, nine hundred eighty-seven million, six hundred seventy-four thousand, four hundred sixty-one".