138337451 has 4 divisors (see below), whose sum is σ = 158099952. Its totient is φ = 118574952.

The previous prime is 138337439. The next prime is 138337457. The reversal of 138337451 is 154733831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138337451 - 2¹⁰ = 138336427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138337457) 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, 9881240 + ... + 9881253.

It is an arithmetic number, because the mean of its divisors is an integer number (39524988).

Almost surely, 2^138337451 is an apocalyptic number.

138337451 is a deficient number, since it is larger than the sum of its proper divisors (19762501).

138337451 is an equidigital number, since it uses as much as digits as its factorization.

138337451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19762500.

The product of its digits is 30240, while the sum is 35.

The square root of 138337451 is about 11761.6942231976. The cubic root of 138337451 is about 517.1857969617.

The spelling of 138337451 in words is "one hundred thirty-eight million, three hundred thirty-seven thousand, four hundred fifty-one".