71979767 has 2 divisors, whose sum is σ = 71979768. Its totient is φ = 71979766.

The previous prime is 71979731. The next prime is 71979773. The reversal of 71979767 is 76797917.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71979767 - 2⁶ = 71979703 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 (71979707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35989883 + 35989884.

It is an arithmetic number, because the mean of its divisors is an integer number (35989884).

Almost surely, 2^71979767 is an apocalyptic number.

71979767 is a deficient number, since it is larger than the sum of its proper divisors (1).

71979767 is an equidigital number, since it uses as much as digits as its factorization.

71979767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1166886, while the sum is 53.

The square root of 71979767 is about 8484.0890495091. The cubic root of 71979767 is about 415.9777921299.

The spelling of 71979767 in words is "seventy-one million, nine hundred seventy-nine thousand, seven hundred sixty-seven".