137231473 has 2 divisors, whose sum is σ = 137231474. Its totient is φ = 137231472.

The previous prime is 137231461. The next prime is 137231537. The reversal of 137231473 is 374132731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132871729 + 4359744 = 11527^2 + 2088^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137231473 is a prime.

It is not a weakly prime, because it can be changed into another prime (137231443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68615736 + 68615737.

It is an arithmetic number, because the mean of its divisors is an integer number (68615737).

Almost surely, 2^137231473 is an apocalyptic number.

It is an amenable number.

137231473 is a deficient number, since it is larger than the sum of its proper divisors (1).

137231473 is an equidigital number, since it uses as much as digits as its factorization.

137231473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 31.

The square root of 137231473 is about 11714.5837740826. The cubic root of 137231473 is about 515.8038447275.

The spelling of 137231473 in words is "one hundred thirty-seven million, two hundred thirty-one thousand, four hundred seventy-three".