71976973 has 2 divisors, whose sum is σ = 71976974. Its totient is φ = 71976972.

The previous prime is 71976967. The next prime is 71976977. The reversal of 71976973 is 37967917.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71876484 + 100489 = 8478^2 + 317^2 .

It is a cyclic number.

It is not a de Polignac number, because 71976973 - 2⁹ = 71976461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71976977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35988486 + 35988487.

It is an arithmetic number, because the mean of its divisors is an integer number (35988487).

Almost surely, 2^71976973 is an apocalyptic number.

It is an amenable number.

71976973 is a deficient number, since it is larger than the sum of its proper divisors (1).

71976973 is an equidigital number, since it uses as much as digits as its factorization.

71976973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 500094, while the sum is 49.

The square root of 71976973 is about 8483.9243867446. The cubic root of 71976973 is about 415.9724097980.

The spelling of 71976973 in words is "seventy-one million, nine hundred seventy-six thousand, nine hundred seventy-three".