137769431 has 2 divisors, whose sum is σ = 137769432. Its totient is φ = 137769430.

The previous prime is 137769427. The next prime is 137769449. The reversal of 137769431 is 134967731.

137769431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (134967731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137769431 - 2² = 137769427 is a prime.

It is a super-2 number, since 2×137769431² = 37960832236127522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137769421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68884715 + 68884716.

It is an arithmetic number, because the mean of its divisors is an integer number (68884716).

Almost surely, 2^137769431 is an apocalyptic number.

137769431 is a deficient number, since it is larger than the sum of its proper divisors (1).

137769431 is an equidigital number, since it uses as much as digits as its factorization.

137769431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 41.

The square root of 137769431 is about 11737.5223535463. The cubic root of 137769431 is about 516.4769629371.

The spelling of 137769431 in words is "one hundred thirty-seven million, seven hundred sixty-nine thousand, four hundred thirty-one".