12387631901 has 2 divisors, whose sum is σ = 12387631902. Its totient is φ = 12387631900.

The previous prime is 12387631897. The next prime is 12387631969. The reversal of 12387631901 is 10913678321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9934906276 + 2452725625 = 99674^2 + 49525^2 .

It is a cyclic number.

It is not a de Polignac number, because 12387631901 - 2² = 12387631897 is a prime.

It is a super-2 number, since 2×12387631901² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12387630901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6193815950 + 6193815951.

It is an arithmetic number, because the mean of its divisors is an integer number (6193815951).

Almost surely, 2^12387631901 is an apocalyptic number.

It is an amenable number.

12387631901 is a deficient number, since it is larger than the sum of its proper divisors (1).

12387631901 is an equidigital number, since it uses as much as digits as its factorization.

12387631901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The spelling of 12387631901 in words is "twelve billion, three hundred eighty-seven million, six hundred thirty-one thousand, nine hundred one".