75399953 has 2 divisors, whose sum is σ = 75399954. Its totient is φ = 75399952.

The previous prime is 75399949. The next prime is 75399997. The reversal of 75399953 is 35999357.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71351809 + 4048144 = 8447^2 + 2012^2 .

It is a cyclic number.

It is not a de Polignac number, because 75399953 - 2² = 75399949 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (75399553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37699976 + 37699977.

It is an arithmetic number, because the mean of its divisors is an integer number (37699977).

Almost surely, 2^75399953 is an apocalyptic number.

It is an amenable number.

75399953 is a deficient number, since it is larger than the sum of its proper divisors (1).

75399953 is an equidigital number, since it uses as much as digits as its factorization.

75399953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1148175, while the sum is 50.

The square root of 75399953 is about 8683.3146320976. The cubic root of 75399953 is about 422.4646338988.

The spelling of 75399953 in words is "seventy-five million, three hundred ninety-nine thousand, nine hundred fifty-three".