99953639 has 2 divisors, whose sum is σ = 99953640. Its totient is φ = 99953638.

The previous prime is 99953617. The next prime is 99953657. The reversal of 99953639 is 93635999.

It is a strong prime.

It is an emirp because it is prime and its reverse (93635999) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99953639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99953339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49976819 + 49976820.

It is an arithmetic number, because the mean of its divisors is an integer number (49976820).

Almost surely, 2^99953639 is an apocalyptic number.

99953639 is a deficient number, since it is larger than the sum of its proper divisors (1).

99953639 is an equidigital number, since it uses as much as digits as its factorization.

99953639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1771470, while the sum is 53.

The square root of 99953639 is about 9997.6816812699. The cubic root of 99953639 is about 464.0871427069.

The spelling of 99953639 in words is "ninety-nine million, nine hundred fifty-three thousand, six hundred thirty-nine".