137996429 has 4 divisors (see below), whose sum is σ = 146113884. Its totient is φ = 129878976.

The previous prime is 137996399. The next prime is 137996431. The reversal of 137996429 is 924699731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 924699731 = 1597 ⋅579023.

It can be written as a sum of positive squares in 2 ways, for example, as 69272329 + 68724100 = 8323^2 + 8290^2 .

It is a cyclic number.

It is not a de Polignac number, because 137996429 - 2¹² = 137992333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137996459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4058702 + ... + 4058735.

It is an arithmetic number, because the mean of its divisors is an integer number (36528471).

Almost surely, 2^137996429 is an apocalyptic number.

It is an amenable number.

137996429 is a deficient number, since it is larger than the sum of its proper divisors (8117455).

137996429 is an equidigital number, since it uses as much as digits as its factorization.

137996429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8117454.

The product of its digits is 734832, while the sum is 50.

The square root of 137996429 is about 11747.1881316339. The cubic root of 137996429 is about 516.7604677884.

The spelling of 137996429 in words is "one hundred thirty-seven million, nine hundred ninety-six thousand, four hundred twenty-nine".