137445431 has 2 divisors, whose sum is σ = 137445432. Its totient is φ = 137445430.

The previous prime is 137445389. The next prime is 137445443. The reversal of 137445431 is 134544731.

It is a strong prime.

It is an emirp because it is prime and its reverse (134544731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137445431 is a prime.

It is a super-2 number, since 2×137445431² = 37782493005551522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137405431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68722715 + 68722716.

It is an arithmetic number, because the mean of its divisors is an integer number (68722716).

Almost surely, 2^137445431 is an apocalyptic number.

137445431 is a deficient number, since it is larger than the sum of its proper divisors (1).

137445431 is an equidigital number, since it uses as much as digits as its factorization.

137445431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 32.

The square root of 137445431 is about 11723.7123386750. The cubic root of 137445431 is about 516.0717693074.

The spelling of 137445431 in words is "one hundred thirty-seven million, four hundred forty-five thousand, four hundred thirty-one".