77941057 has 2 divisors, whose sum is σ = 77941058. Its totient is φ = 77941056.

The previous prime is 77941049. The next prime is 77941093. The reversal of 77941057 is 75014977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39488656 + 38452401 = 6284^2 + 6201^2 .

It is an emirp because it is prime and its reverse (75014977) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77941057 - 2³ = 77941049 is a prime.

It is not a weakly prime, because it can be changed into another prime (77944057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38970528 + 38970529.

It is an arithmetic number, because the mean of its divisors is an integer number (38970529).

Almost surely, 2^77941057 is an apocalyptic number.

It is an amenable number.

77941057 is a deficient number, since it is larger than the sum of its proper divisors (1).

77941057 is an equidigital number, since it uses as much as digits as its factorization.

77941057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61740, while the sum is 40.

The square root of 77941057 is about 8828.4232454046. The cubic root of 77941057 is about 427.1582156976.

The spelling of 77941057 in words is "seventy-seven million, nine hundred forty-one thousand, fifty-seven".