75309973 has 2 divisors, whose sum is σ = 75309974. Its totient is φ = 75309972.

The previous prime is 75309961. The next prime is 75310003. The reversal of 75309973 is 37990357.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44916804 + 30393169 = 6702^2 + 5513^2 .

It is a cyclic number.

It is not a de Polignac number, because 75309973 - 2²⁵ = 41755541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75309173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37654986 + 37654987.

It is an arithmetic number, because the mean of its divisors is an integer number (37654987).

Almost surely, 2^75309973 is an apocalyptic number.

It is an amenable number.

75309973 is a deficient number, since it is larger than the sum of its proper divisors (1).

75309973 is an equidigital number, since it uses as much as digits as its factorization.

75309973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 178605, while the sum is 43.

The square root of 75309973 is about 8678.1318842249. The cubic root of 75309973 is about 422.2965148766.

The spelling of 75309973 in words is "seventy-five million, three hundred nine thousand, nine hundred seventy-three".