97280591 has 2 divisors, whose sum is σ = 97280592. Its totient is φ = 97280590.

The previous prime is 97280581. The next prime is 97280633. The reversal of 97280591 is 19508279.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97280591 - 2¹⁴ = 97264207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97280581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48640295 + 48640296.

It is an arithmetic number, because the mean of its divisors is an integer number (48640296).

Almost surely, 2^97280591 is an apocalyptic number.

97280591 is a deficient number, since it is larger than the sum of its proper divisors (1).

97280591 is an equidigital number, since it uses as much as digits as its factorization.

97280591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 97280591 is about 9863.0923649736. The cubic root of 97280591 is about 459.9126976728.

The spelling of 97280591 in words is "ninety-seven million, two hundred eighty thousand, five hundred ninety-one".