72739061 has 4 divisors (see below), whose sum is σ = 73159692. Its totient is φ = 72318432.

The previous prime is 72739057. The next prime is 72739063. The reversal of 72739061 is 16093727.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25816561 + 46922500 = 5081^2 + 6850^2 .

It is a cyclic number.

It is not a de Polignac number, because 72739061 - 2² = 72739057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72739063) 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, 210056 + ... + 210401.

It is an arithmetic number, because the mean of its divisors is an integer number (18289923).

Almost surely, 2^72739061 is an apocalyptic number.

It is an amenable number.

72739061 is a deficient number, since it is larger than the sum of its proper divisors (420631).

72739061 is a wasteful number, since it uses less digits than its factorization.

72739061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420630.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 72739061 is about 8528.7197749721. The cubic root of 72739061 is about 417.4353559062.

The spelling of 72739061 in words is "seventy-two million, seven hundred thirty-nine thousand, sixty-one".