77941995 has 32 divisors (see below), whose sum is σ = 129729600. Its totient is φ = 39911424.

The previous prime is 77941993. The next prime is 77941999. The reversal of 77941995 is 59914977.

It is a happy number.

It is not a de Polignac number, because 77941995 - 2¹ = 77941993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77941993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100971 + ... + 101739.

It is an arithmetic number, because the mean of its divisors is an integer number (4054050).

Almost surely, 2^77941995 is an apocalyptic number.

77941995 is a deficient number, since it is larger than the sum of its proper divisors (51787605).

77941995 is a wasteful number, since it uses less digits than its factorization.

77941995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039.

The product of its digits is 714420, while the sum is 51.

The square root of 77941995 is about 8828.4763691138. The cubic root of 77941995 is about 427.1599292694.

The spelling of 77941995 in words is "seventy-seven million, nine hundred forty-one thousand, nine hundred ninety-five".