75604981 has 2 divisors, whose sum is σ = 75604982. Its totient is φ = 75604980.

The previous prime is 75604961. The next prime is 75605027. The reversal of 75604981 is 18940657.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45684081 + 29920900 = 6759^2 + 5470^2 .

It is an emirp because it is prime and its reverse (18940657) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75604981 - 2⁷ = 75604853 is a prime.

It is a super-2 number, since 2×75604981² = 11432226304020722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75604931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37802490 + 37802491.

It is an arithmetic number, because the mean of its divisors is an integer number (37802491).

Almost surely, 2^75604981 is an apocalyptic number.

It is an amenable number.

75604981 is a deficient number, since it is larger than the sum of its proper divisors (1).

75604981 is an equidigital number, since it uses as much as digits as its factorization.

75604981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 75604981 is about 8695.1124777084. The cubic root of 75604981 is about 422.8472101207.

The spelling of 75604981 in words is "seventy-five million, six hundred four thousand, nine hundred eighty-one".