97722539 has 2 divisors, whose sum is σ = 97722540. Its totient is φ = 97722538.

The previous prime is 97722523. The next prime is 97722593. The reversal of 97722539 is 93522779.

It is a happy number.

Together with next prime (97722593) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97722539 - 2⁴ = 97722523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97722539.

It is not a weakly prime, because it can be changed into another prime (97722839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48861269 + 48861270.

It is an arithmetic number, because the mean of its divisors is an integer number (48861270).

Almost surely, 2^97722539 is an apocalyptic number.

97722539 is a deficient number, since it is larger than the sum of its proper divisors (1).

97722539 is an equidigital number, since it uses as much as digits as its factorization.

97722539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238140, while the sum is 44.

The square root of 97722539 is about 9885.4711066292. The cubic root of 97722539 is about 460.6081103554.

The spelling of 97722539 in words is "ninety-seven million, seven hundred twenty-two thousand, five hundred thirty-nine".