99636461 has 4 divisors (see below), whose sum is σ = 101953632. Its totient is φ = 97319292.

The previous prime is 99636421. The next prime is 99636469. The reversal of 99636461 is 16463699.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99636461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99636469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1158521 + ... + 1158606.

It is an arithmetic number, because the mean of its divisors is an integer number (25488408).

Almost surely, 2^99636461 is an apocalyptic number.

99636461 is the 5336-th centered heptagonal number.

It is an amenable number.

99636461 is a deficient number, since it is larger than the sum of its proper divisors (2317171).

99636461 is a wasteful number, since it uses less digits than its factorization.

99636461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317170.

The product of its digits is 209952, while the sum is 44.

The square root of 99636461 is about 9981.8064998276. The cubic root of 99636461 is about 463.5957341990.

The spelling of 99636461 in words is "ninety-nine million, six hundred thirty-six thousand, four hundred sixty-one".