73520997 has 16 divisors (see below), whose sum is σ = 108449280. Its totient is φ = 43929200.

The previous prime is 73520989. The next prime is 73521037. The reversal of 73520997 is 79902537.

It is a cyclic number.

It is not a de Polignac number, because 73520997 - 2³ = 73520989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73520917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13347 + ... + 18032.

It is an arithmetic number, because the mean of its divisors is an integer number (6778080).

Almost surely, 2^73520997 is an apocalyptic number.

It is an amenable number.

73520997 is a deficient number, since it is larger than the sum of its proper divisors (34928283).

73520997 is a wasteful number, since it uses less digits than its factorization.

73520997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31464.

The product of its (nonzero) digits is 119070, while the sum is 42.

The square root of 73520997 is about 8574.4385822047. The cubic root of 73520997 is about 418.9258208138.

The spelling of 73520997 in words is "seventy-three million, five hundred twenty thousand, nine hundred ninety-seven".