99701649 has 12 divisors (see below), whose sum is σ = 147363216. Its totient is φ = 64921752.

The previous prime is 99701621. The next prime is 99701653. The reversal of 99701649 is 94610799.

It is not a de Polignac number, because 99701649 - 2¹¹ = 99699601 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99701659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128427 + ... + 129200.

It is an arithmetic number, because the mean of its divisors is an integer number (12280268).

Almost surely, 2^99701649 is an apocalyptic number.

It is an amenable number.

99701649 is a deficient number, since it is larger than the sum of its proper divisors (47661567).

99701649 is a wasteful number, since it uses less digits than its factorization.

99701649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257676 (or 257673 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 99701649 is about 9985.0713067058. The cubic root of 99701649 is about 463.6968159719.

The spelling of 99701649 in words is "ninety-nine million, seven hundred one thousand, six hundred forty-nine".