137720474 has 8 divisors (see below), whose sum is σ = 217453440. Its totient is φ = 65235996.

The previous prime is 137720419. The next prime is 137720477. The reversal of 137720474 is 474027731.

It is a happy number.

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

It is a super-3 number, since 3×137720474³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (137720477) 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 in 3 ways as a sum of consecutive naturals, for example, 1812074 + ... + 1812149.

It is an arithmetic number, because the mean of its divisors is an integer number (27181680).

Almost surely, 2^137720474 is an apocalyptic number.

137720474 is a deficient number, since it is larger than the sum of its proper divisors (79732966).

137720474 is a wasteful number, since it uses less digits than its factorization.

137720474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3624244.

The product of its (nonzero) digits is 32928, while the sum is 35.

The square root of 137720474 is about 11735.4366770052. The cubic root of 137720474 is about 516.4157782022.

The spelling of 137720474 in words is "one hundred thirty-seven million, seven hundred twenty thousand, four hundred seventy-four".