72373739 has 4 divisors (see below), whose sum is σ = 74329824. Its totient is φ = 70417656.

The previous prime is 72373723. The next prime is 72373751. The reversal of 72373739 is 93737327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93737327 = 151 ⋅620777.

It is a cyclic number.

It is not a de Polignac number, because 72373739 - 2⁴ = 72373723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72373696 and 72373705.

It is not an unprimeable number, because it can be changed into a prime (72373789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 977987 + ... + 978060.

It is an arithmetic number, because the mean of its divisors is an integer number (18582456).

Almost surely, 2^72373739 is an apocalyptic number.

72373739 is a deficient number, since it is larger than the sum of its proper divisors (1956085).

72373739 is a wasteful number, since it uses less digits than its factorization.

72373739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956084.

The product of its digits is 166698, while the sum is 41.

The square root of 72373739 is about 8507.2756508767. The cubic root of 72373739 is about 416.7353453369.

The spelling of 72373739 in words is "seventy-two million, three hundred seventy-three thousand, seven hundred thirty-nine".