91723427 has 2 divisors, whose sum is σ = 91723428. Its totient is φ = 91723426.

The previous prime is 91723417. The next prime is 91723439. The reversal of 91723427 is 72432719.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91723427 - 2⁶ = 91723363 is a prime.

It is not a weakly prime, because it can be changed into another prime (91723417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45861713 + 45861714.

It is an arithmetic number, because the mean of its divisors is an integer number (45861714).

Almost surely, 2^91723427 is an apocalyptic number.

91723427 is a deficient number, since it is larger than the sum of its proper divisors (1).

91723427 is an equidigital number, since it uses as much as digits as its factorization.

91723427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 35.

The square root of 91723427 is about 9577.2348305761. The cubic root of 91723427 is about 450.9829165133.

The spelling of 91723427 in words is "ninety-one million, seven hundred twenty-three thousand, four hundred twenty-seven".