72977707 has 4 divisors (see below), whose sum is σ = 79612056. Its totient is φ = 66343360.

The previous prime is 72977701. The next prime is 72977713. The reversal of 72977707 is 70777927.

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

It is an interprime number because it is at equal distance from previous prime (72977701) and next prime (72977713).

It is a cyclic number.

It is not a de Polignac number, because 72977707 - 2¹⁵ = 72944939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72977701) 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, 3317158 + ... + 3317179.

It is an arithmetic number, because the mean of its divisors is an integer number (19903014).

Almost surely, 2^72977707 is an apocalyptic number.

72977707 is a deficient number, since it is larger than the sum of its proper divisors (6634349).

72977707 is a wasteful number, since it uses less digits than its factorization.

72977707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6634348.

The product of its (nonzero) digits is 302526, while the sum is 46.

The square root of 72977707 is about 8542.6990465543. The cubic root of 72977707 is about 417.8913719237.

It can be divided in two parts, 72 and 977707, that added together give a palindrome (977779).

The spelling of 72977707 in words is "seventy-two million, nine hundred seventy-seven thousand, seven hundred seven".