72351739 has 4 divisors (see below), whose sum is σ = 72375120. Its totient is φ = 72328360.

The previous prime is 72351733. The next prime is 72351787. The reversal of 72351739 is 93715327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93715327 = 29 ⋅3231563.

It is a cyclic number.

It is not a de Polignac number, because 72351739 - 2⁵ = 72351707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72351698 and 72351707.

It is not an unprimeable number, because it can be changed into a prime (72351733) 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, 6184 + ... + 13525.

It is an arithmetic number, because the mean of its divisors is an integer number (18093780).

Almost surely, 2^72351739 is an apocalyptic number.

72351739 is a deficient number, since it is larger than the sum of its proper divisors (23381).

72351739 is a wasteful number, since it uses less digits than its factorization.

72351739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23380.

The product of its digits is 39690, while the sum is 37.

The square root of 72351739 is about 8505.9825417173. The cubic root of 72351739 is about 416.6931149789.

The spelling of 72351739 in words is "seventy-two million, three hundred fifty-one thousand, seven hundred thirty-nine".