76401977 has 4 divisors (see below), whose sum is σ = 76423056. Its totient is φ = 76380900.

The previous prime is 76401973. The next prime is 76402031. The reversal of 76401977 is 77910467.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 76401977 - 2² = 76401973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76401973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3563 + ... + 12864.

It is an arithmetic number, because the mean of its divisors is an integer number (19105764).

Almost surely, 2^76401977 is an apocalyptic number.

It is an amenable number.

76401977 is a deficient number, since it is larger than the sum of its proper divisors (21079).

76401977 is a wasteful number, since it uses less digits than its factorization.

76401977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21078.

The product of its (nonzero) digits is 74088, while the sum is 41.

The square root of 76401977 is about 8740.8224441411. The cubic root of 76401977 is about 424.3278454796.

The spelling of 76401977 in words is "seventy-six million, four hundred one thousand, nine hundred seventy-seven".