77001971 has 2 divisors, whose sum is σ = 77001972. Its totient is φ = 77001970.

The previous prime is 77001943. The next prime is 77001983. The reversal of 77001971 is 17910077.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77001971 - 2²² = 72807667 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77001941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38500985 + 38500986.

It is an arithmetic number, because the mean of its divisors is an integer number (38500986).

Almost surely, 2^77001971 is an apocalyptic number.

77001971 is a deficient number, since it is larger than the sum of its proper divisors (1).

77001971 is an equidigital number, since it uses as much as digits as its factorization.

77001971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3087, while the sum is 32.

The square root of 77001971 is about 8775.0766948215. The cubic root of 77001971 is about 425.4357164660.

The spelling of 77001971 in words is "seventy-seven million, one thousand, nine hundred seventy-one".