25087131397 has 2 divisors, whose sum is σ = 25087131398. Its totient is φ = 25087131396.

The previous prime is 25087131383. The next prime is 25087131401. The reversal of 25087131397 is 79313178052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24771926881 + 315204516 = 157391^2 + 17754^2 .

It is a cyclic number.

It is not a de Polignac number, because 25087131397 - 2³¹ = 22939647749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25087131197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12543565698 + 12543565699.

It is an arithmetic number, because the mean of its divisors is an integer number (12543565699).

Almost surely, 2^25087131397 is an apocalyptic number.

It is an amenable number.

25087131397 is a deficient number, since it is larger than the sum of its proper divisors (1).

25087131397 is an equidigital number, since it uses as much as digits as its factorization.

25087131397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 46.

The spelling of 25087131397 in words is "twenty-five billion, eighty-seven million, one hundred thirty-one thousand, three hundred ninety-seven".