75611957 has 2 divisors, whose sum is σ = 75611958. Its totient is φ = 75611956.

The previous prime is 75611953. The next prime is 75611989. The reversal of 75611957 is 75911657.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47458321 + 28153636 = 6889^2 + 5306^2 .

It is an emirp because it is prime and its reverse (75911657) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75611957 - 2² = 75611953 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75611953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37805978 + 37805979.

It is an arithmetic number, because the mean of its divisors is an integer number (37805979).

Almost surely, 2^75611957 is an apocalyptic number.

It is an amenable number.

75611957 is a deficient number, since it is larger than the sum of its proper divisors (1).

75611957 is an equidigital number, since it uses as much as digits as its factorization.

75611957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66150, while the sum is 41.

The square root of 75611957 is about 8695.5136133526. The cubic root of 75611957 is about 422.8602149580.

The spelling of 75611957 in words is "seventy-five million, six hundred eleven thousand, nine hundred fifty-seven".