137431478 has 8 divisors (see below), whose sum is σ = 210533472. Its totient is φ = 67253656.

The previous prime is 137431471. The next prime is 137431487. The reversal of 137431478 is 874134731.

137431478 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×137431478² = 37774822290528968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137431471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 730925 + ... + 731112.

It is an arithmetic number, because the mean of its divisors is an integer number (26316684).

Almost surely, 2^137431478 is an apocalyptic number.

137431478 is a deficient number, since it is larger than the sum of its proper divisors (73101994).

137431478 is a wasteful number, since it uses less digits than its factorization.

137431478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462086.

The product of its digits is 56448, while the sum is 38.

The square root of 137431478 is about 11723.1172475583. The cubic root of 137431478 is about 516.0543054237.

The spelling of 137431478 in words is "one hundred thirty-seven million, four hundred thirty-one thousand, four hundred seventy-eight".