73056991 has 6 divisors (see below), whose sum is σ = 84984720. Its totient is φ = 62620236.

The previous prime is 73056983. The next prime is 73057009. The reversal of 73056991 is 19965037.

It is not a de Polignac number, because 73056991 - 2³ = 73056983 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 (73056931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 745431 + ... + 745528.

It is an arithmetic number, because the mean of its divisors is an integer number (14164120).

Almost surely, 2^73056991 is an apocalyptic number.

73056991 is a deficient number, since it is larger than the sum of its proper divisors (11927729).

73056991 is a wasteful number, since it uses less digits than its factorization.

73056991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490973 (or 1490966 counting only the distinct ones).

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 73056991 is about 8547.3382406454. The cubic root of 73056991 is about 418.0426514936.

It can be divided in two parts, 73056 and 991, that added together give a palindrome (74047).

The spelling of 73056991 in words is "seventy-three million, fifty-six thousand, nine hundred ninety-one".