99400897 has 2 divisors, whose sum is σ = 99400898. Its totient is φ = 99400896.

The previous prime is 99400841. The next prime is 99400901. The reversal of 99400897 is 79800499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76895361 + 22505536 = 8769^2 + 4744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99400897 is a prime.

It is not a weakly prime, because it can be changed into another prime (99400297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49700448 + 49700449.

It is an arithmetic number, because the mean of its divisors is an integer number (49700449).

Almost surely, 2^99400897 is an apocalyptic number.

It is an amenable number.

99400897 is a deficient number, since it is larger than the sum of its proper divisors (1).

99400897 is an equidigital number, since it uses as much as digits as its factorization.

99400897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 99400897 is about 9969.9998495486. Note that the first 3 decimals coincide. The cubic root of 99400897 is about 463.2300961555.

The spelling of 99400897 in words is "ninety-nine million, four hundred thousand, eight hundred ninety-seven".