137992406 has 4 divisors (see below), whose sum is σ = 206988612. Its totient is φ = 68996202.

The previous prime is 137992403. The next prime is 137992447. The reversal of 137992406 is 604299731.

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

It is a super-2 number, since 2×137992406² = 38083808227337672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137992403) by changing a digit.

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, 34498100 + ... + 34498103.

It is an arithmetic number, because the mean of its divisors is an integer number (51747153).

Almost surely, 2^137992406 is an apocalyptic number.

137992406 is a deficient number, since it is larger than the sum of its proper divisors (68996206).

137992406 is an equidigital number, since it uses as much as digits as its factorization.

137992406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68996205.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 137992406 is about 11747.0168979192. The cubic root of 137992406 is about 516.7554460460.

The spelling of 137992406 in words is "one hundred thirty-seven million, nine hundred ninety-two thousand, four hundred six".