72744707 has 4 divisors (see below), whose sum is σ = 83136816. Its totient is φ = 62352600.

The previous prime is 72744641. The next prime is 72744709. The reversal of 72744707 is 70744727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70744727 = 499 ⋅141773.

It is a cyclic number.

It is not a de Polignac number, because 72744707 - 2¹² = 72740611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72744709) 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, 5196044 + ... + 5196057.

It is an arithmetic number, because the mean of its divisors is an integer number (20784204).

Almost surely, 2^72744707 is an apocalyptic number.

72744707 is a deficient number, since it is larger than the sum of its proper divisors (10392109).

72744707 is a wasteful number, since it uses less digits than its factorization.

72744707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10392108.

The product of its (nonzero) digits is 76832, while the sum is 38.

The square root of 72744707 is about 8529.0507678170. The cubic root of 72744707 is about 417.4461560595.

The spelling of 72744707 in words is "seventy-two million, seven hundred forty-four thousand, seven hundred seven".