71136979 has 2 divisors, whose sum is σ = 71136980. Its totient is φ = 71136978.

The previous prime is 71136943. The next prime is 71136983. The reversal of 71136979 is 97963117.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71136979 - 2⁷ = 71136851 is a prime.

It is not a weakly prime, because it can be changed into another prime (71136679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35568489 + 35568490.

It is an arithmetic number, because the mean of its divisors is an integer number (35568490).

Almost surely, 2^71136979 is an apocalyptic number.

71136979 is a deficient number, since it is larger than the sum of its proper divisors (1).

71136979 is an equidigital number, since it uses as much as digits as its factorization.

71136979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71442, while the sum is 43.

The square root of 71136979 is about 8434.2740647906. The cubic root of 71136979 is about 414.3478973361.

The spelling of 71136979 in words is "seventy-one million, one hundred thirty-six thousand, nine hundred seventy-nine".