99945739 has 2 divisors, whose sum is σ = 99945740. Its totient is φ = 99945738.

The previous prime is 99945721. The next prime is 99945743. The reversal of 99945739 is 93754999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99945739 - 2⁵ = 99945707 is a prime.

It is a super-2 number, since 2×99945739² = 19978301488512242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99945739.

It is not a weakly prime, because it can be changed into another prime (99945749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49972869 + 49972870.

It is an arithmetic number, because the mean of its divisors is an integer number (49972870).

Almost surely, 2^99945739 is an apocalyptic number.

99945739 is a deficient number, since it is larger than the sum of its proper divisors (1).

99945739 is an equidigital number, since it uses as much as digits as its factorization.

99945739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2755620, while the sum is 55.

The square root of 99945739 is about 9997.2865818681. The cubic root of 99945739 is about 464.0749157550.

The spelling of 99945739 in words is "ninety-nine million, nine hundred forty-five thousand, seven hundred thirty-nine".