92721397 has 2 divisors, whose sum is σ = 92721398. Its totient is φ = 92721396.

The previous prime is 92721379. The next prime is 92721437. The reversal of 92721397 is 79312729.

Together with previous prime (92721379) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (92721437) can be obtained adding 92721397 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89000356 + 3721041 = 9434^2 + 1929^2 .

It is a cyclic number.

It is not a de Polignac number, because 92721397 - 2⁷ = 92721269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (92721347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46360698 + 46360699.

It is an arithmetic number, because the mean of its divisors is an integer number (46360699).

Almost surely, 2^92721397 is an apocalyptic number.

It is an amenable number.

92721397 is a deficient number, since it is larger than the sum of its proper divisors (1).

92721397 is an equidigital number, since it uses as much as digits as its factorization.

92721397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 40.

The square root of 92721397 is about 9629.1950338541. The cubic root of 92721397 is about 452.6126162729.

The spelling of 92721397 in words is "ninety-two million, seven hundred twenty-one thousand, three hundred ninety-seven".