137892652921 has 3 divisors (see below), whose sum is σ = 137893024261. Its totient is φ = 137892281582.

The previous prime is 137892652907. The next prime is 137892652979. The reversal of 137892652921 is 129256298731.

The square root of 137892652921 is 371339.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 129256298731 = 7 ⋅18465185533.

It is not a de Polignac number, because 137892652921 - 2³³ = 129302718329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137892659921) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 185670 + ... + 557008.

Almost surely, 2^137892652921 is an apocalyptic number.

137892652921 is the 371339-th square number.

137892652921 is the 185670-th centered octagonal number.

It is an amenable number.

137892652921 is a deficient number, since it is larger than the sum of its proper divisors (371340).

137892652921 is an frugal number, since it uses more digits than its factorization.

137892652921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742678 (or 371339 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 55.

The spelling of 137892652921 in words is "one hundred thirty-seven billion, eight hundred ninety-two million, six hundred fifty-two thousand, nine hundred twenty-one".