73290257 has 4 divisors (see below), whose sum is σ = 73460736. Its totient is φ = 73119780.

The previous prime is 73290253. The next prime is 73290271. The reversal of 73290257 is 75209237.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73290257 - 2² = 73290253 is a prime.

It is a super-2 number, since 2×73290257² = 10742923542252098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73290253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84593 + ... + 85454.

It is an arithmetic number, because the mean of its divisors is an integer number (18365184).

Almost surely, 2^73290257 is an apocalyptic number.

It is an amenable number.

73290257 is a deficient number, since it is larger than the sum of its proper divisors (170479).

73290257 is a wasteful number, since it uses less digits than its factorization.

73290257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170478.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 73290257 is about 8560.9729003192. The cubic root of 73290257 is about 418.4871060358.

The spelling of 73290257 in words is "seventy-three million, two hundred ninety thousand, two hundred fifty-seven".