97281799 has 2 divisors, whose sum is σ = 97281800. Its totient is φ = 97281798.

The previous prime is 97281713. The next prime is 97281809. The reversal of 97281799 is 99718279.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97281799 - 2¹⁷ = 97150727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97281199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48640899 + 48640900.

It is an arithmetic number, because the mean of its divisors is an integer number (48640900).

Almost surely, 2^97281799 is an apocalyptic number.

97281799 is a deficient number, since it is larger than the sum of its proper divisors (1).

97281799 is an equidigital number, since it uses as much as digits as its factorization.

97281799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 52.

The square root of 97281799 is about 9863.1536031839. The cubic root of 97281799 is about 459.9146013491.

The spelling of 97281799 in words is "ninety-seven million, two hundred eighty-one thousand, seven hundred ninety-nine".