137797986427 has 4 divisors (see below), whose sum is σ = 138167418400. Its totient is φ = 137428554456.

The previous prime is 137797986413. The next prime is 137797986433. The reversal of 137797986427 is 724689797731.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137797986427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137797986467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184715427 + ... + 184716172.

It is an arithmetic number, because the mean of its divisors is an integer number (34541854600).

Almost surely, 2^137797986427 is an apocalyptic number.

137797986427 is a deficient number, since it is larger than the sum of its proper divisors (369431973).

137797986427 is an equidigital number, since it uses as much as digits as its factorization.

137797986427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369431972.

The product of its digits is 224042112, while the sum is 70.

The spelling of 137797986427 in words is "one hundred thirty-seven billion, seven hundred ninety-seven million, nine hundred eighty-six thousand, four hundred twenty-seven".