99673631 has 2 divisors, whose sum is σ = 99673632. Its totient is φ = 99673630.

The previous prime is 99673627. The next prime is 99673643. The reversal of 99673631 is 13637699.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (13637699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99673631 - 2² = 99673627 is a prime.

It is a super-2 number, since 2×99673631² = 19869665433448322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99673661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49836815 + 49836816.

It is an arithmetic number, because the mean of its divisors is an integer number (49836816).

Almost surely, 2^99673631 is an apocalyptic number.

99673631 is a deficient number, since it is larger than the sum of its proper divisors (1).

99673631 is an equidigital number, since it uses as much as digits as its factorization.

99673631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 44.

The square root of 99673631 is about 9983.6682136377. The cubic root of 99673631 is about 463.6533761201.

The spelling of 99673631 in words is "ninety-nine million, six hundred seventy-three thousand, six hundred thirty-one".