99901097 has 2 divisors, whose sum is σ = 99901098. Its totient is φ = 99901096.

The previous prime is 99901091. The next prime is 99901117. The reversal of 99901097 is 79010999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50395801 + 49505296 = 7099^2 + 7036^2 .

It is a cyclic number.

It is not a de Polignac number, because 99901097 - 2²⁴ = 83123881 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99901091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49950548 + 49950549.

It is an arithmetic number, because the mean of its divisors is an integer number (49950549).

Almost surely, 2^99901097 is an apocalyptic number.

It is an amenable number.

99901097 is a deficient number, since it is larger than the sum of its proper divisors (1).

99901097 is an equidigital number, since it uses as much as digits as its factorization.

99901097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 44.

The square root of 99901097 is about 9995.0536266695. The cubic root of 99901097 is about 464.0058105322.

The spelling of 99901097 in words is "ninety-nine million, nine hundred one thousand, ninety-seven".