72453739 has 4 divisors (see below), whose sum is σ = 72655920. Its totient is φ = 72251560.

The previous prime is 72453721. The next prime is 72453751. The reversal of 72453739 is 93735427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93735427 = 1031 ⋅90917.

It is a cyclic number.

It is not a de Polignac number, because 72453739 - 2¹³ = 72445547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72450739) 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, 100552 + ... + 101269.

It is an arithmetic number, because the mean of its divisors is an integer number (18163980).

Almost surely, 2^72453739 is an apocalyptic number.

72453739 is a deficient number, since it is larger than the sum of its proper divisors (202181).

72453739 is a wasteful number, since it uses less digits than its factorization.

72453739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202180.

The product of its digits is 158760, while the sum is 40.

The square root of 72453739 is about 8511.9762100231. The cubic root of 72453739 is about 416.8888381723. Note that the first 4 decimals are identical.

The spelling of 72453739 in words is "seventy-two million, four hundred fifty-three thousand, seven hundred thirty-nine".