99490649 has 2 divisors, whose sum is σ = 99490650. Its totient is φ = 99490648.

The previous prime is 99490639. The next prime is 99490661. The reversal of 99490649 is 94609499.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97219600 + 2271049 = 9860^2 + 1507^2 .

It is an emirp because it is prime and its reverse (94609499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99490649 - 2⁸ = 99490393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99490597 and 99490606.

It is not a weakly prime, because it can be changed into another prime (99490609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49745324 + 49745325.

It is an arithmetic number, because the mean of its divisors is an integer number (49745325).

Almost surely, 2^99490649 is an apocalyptic number.

It is an amenable number.

99490649 is a deficient number, since it is larger than the sum of its proper divisors (1).

99490649 is an equidigital number, since it uses as much as digits as its factorization.

99490649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 50.

The square root of 99490649 is about 9974.4999373402. The cubic root of 99490649 is about 463.3694755835.

The spelling of 99490649 in words is "ninety-nine million, four hundred ninety thousand, six hundred forty-nine".