99390497 has 2 divisors, whose sum is σ = 99390498. Its totient is φ = 99390496.

The previous prime is 99390493. The next prime is 99390509. The reversal of 99390497 is 79409399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93392896 + 5997601 = 9664^2 + 2449^2 .

It is a cyclic number.

It is not a de Polignac number, because 99390497 - 2² = 99390493 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99390493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49695248 + 49695249.

It is an arithmetic number, because the mean of its divisors is an integer number (49695249).

Almost surely, 2^99390497 is an apocalyptic number.

It is an amenable number.

99390497 is a deficient number, since it is larger than the sum of its proper divisors (1).

99390497 is an equidigital number, since it uses as much as digits as its factorization.

99390497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 551124, while the sum is 50.

The square root of 99390497 is about 9969.4782712036. The cubic root of 99390497 is about 463.2139401610.

It can be divided in two parts, 99390 and 497, that multiplied together give a triangular number (49396830 = T₉₉₃₉).

The spelling of 99390497 in words is "ninety-nine million, three hundred ninety thousand, four hundred ninety-seven".