72771427 has 2 divisors, whose sum is σ = 72771428. Its totient is φ = 72771426.

The previous prime is 72771421. The next prime is 72771431. The reversal of 72771427 is 72417727.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72771427 - 2⁷ = 72771299 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72771421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36385713 + 36385714.

It is an arithmetic number, because the mean of its divisors is an integer number (36385714).

Almost surely, 2^72771427 is an apocalyptic number.

72771427 is a deficient number, since it is larger than the sum of its proper divisors (1).

72771427 is an equidigital number, since it uses as much as digits as its factorization.

72771427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38416, while the sum is 37.

The square root of 72771427 is about 8530.6170351271. The cubic root of 72771427 is about 417.4972607898.

The spelling of 72771427 in words is "seventy-two million, seven hundred seventy-one thousand, four hundred twenty-seven".