72671113 has 2 divisors, whose sum is σ = 72671114. Its totient is φ = 72671112.

The previous prime is 72671111. The next prime is 72671149. The reversal of 72671113 is 31117627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72641529 + 29584 = 8523^2 + 172^2 .

It is a cyclic number.

It is not a de Polignac number, because 72671113 - 2¹ = 72671111 is a prime.

Together with 72671111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (72671111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36335556 + 36335557.

It is an arithmetic number, because the mean of its divisors is an integer number (36335557).

Almost surely, 2^72671113 is an apocalyptic number.

It is an amenable number.

72671113 is a deficient number, since it is larger than the sum of its proper divisors (1).

72671113 is an equidigital number, since it uses as much as digits as its factorization.

72671113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1764, while the sum is 28.

The square root of 72671113 is about 8524.7353624614. The cubic root of 72671113 is about 417.3053352834.

The spelling of 72671113 in words is "seventy-two million, six hundred seventy-one thousand, one hundred thirteen".