137789473 has 2 divisors, whose sum is σ = 137789474. Its totient is φ = 137789472.

The previous prime is 137789461. The next prime is 137789489. The reversal of 137789473 is 374987731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118004769 + 19784704 = 10863^2 + 4448^2 .

It is an emirp because it is prime and its reverse (374987731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137789473 is a prime.

It is not a weakly prime, because it can be changed into another prime (137789413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68894736 + 68894737.

It is an arithmetic number, because the mean of its divisors is an integer number (68894737).

Almost surely, 2^137789473 is an apocalyptic number.

It is an amenable number.

137789473 is a deficient number, since it is larger than the sum of its proper divisors (1).

137789473 is an equidigital number, since it uses as much as digits as its factorization.

137789473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 889056, while the sum is 49.

The square root of 137789473 is about 11738.3760801910. The cubic root of 137789473 is about 516.5020065415.

The spelling of 137789473 in words is "one hundred thirty-seven million, seven hundred eighty-nine thousand, four hundred seventy-three".