72917671 has 2 divisors, whose sum is σ = 72917672. Its totient is φ = 72917670.

The previous prime is 72917653. The next prime is 72917681. The reversal of 72917671 is 17671927.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72917671 - 2⁷ = 72917543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72917681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36458835 + 36458836.

It is an arithmetic number, because the mean of its divisors is an integer number (36458836).

Almost surely, 2^72917671 is an apocalyptic number.

72917671 is a deficient number, since it is larger than the sum of its proper divisors (1).

72917671 is an equidigital number, since it uses as much as digits as its factorization.

72917671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37044, while the sum is 40.

The square root of 72917671 is about 8539.1844458356. The cubic root of 72917671 is about 417.7767460086.

The spelling of 72917671 in words is "seventy-two million, nine hundred seventeen thousand, six hundred seventy-one".