13137973642 has 4 divisors (see below), whose sum is σ = 19706960466. Its totient is φ = 6568986820.

The previous prime is 13137973603. The next prime is 13137973663. The reversal of 13137973642 is 24637973131.

It is a Cunningham number, because it is equal to 114621²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13137973641 + 1 = 114621^2 + 1^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13137973592 and 13137973601.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3284493409 + ... + 3284493412.

Almost surely, 2^13137973642 is an apocalyptic number.

13137973642 is a deficient number, since it is larger than the sum of its proper divisors (6568986824).

13137973642 is an equidigital number, since it uses as much as digits as its factorization.

13137973642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6568986823.

The product of its digits is 571536, while the sum is 46.

The spelling of 13137973642 in words is "thirteen billion, one hundred thirty-seven million, nine hundred seventy-three thousand, six hundred forty-two".