137163986 has 4 divisors (see below), whose sum is σ = 205745982. Its totient is φ = 68581992.

The previous prime is 137163913. The next prime is 137163991. The reversal of 137163986 is 689361731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 689361731 = 107 ⋅6442633.

It can be written as a sum of positive squares in only one way, i.e., 133287025 + 3876961 = 11545^2 + 1969^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34290995 + ... + 34290998.

Almost surely, 2^137163986 is an apocalyptic number.

137163986 is a deficient number, since it is larger than the sum of its proper divisors (68581996).

137163986 is an equidigital number, since it uses as much as digits as its factorization.

137163986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68581995.

The product of its digits is 163296, while the sum is 44.

The square root of 137163986 is about 11711.7029504680. The cubic root of 137163986 is about 515.7192777277.

The spelling of 137163986 in words is "one hundred thirty-seven million, one hundred sixty-three thousand, nine hundred eighty-six".