99990739 has 2 divisors, whose sum is σ = 99990740. Its totient is φ = 99990738.

The previous prime is 99990731. The next prime is 99990757. The reversal of 99990739 is 93709999.

It is a weak prime.

It is an emirp because it is prime and its reverse (93709999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99990739 - 2³ = 99990731 is a prime.

It is a super-2 number, since 2×99990739² = 19996295771532242, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99990739.

It is not a weakly prime, because it can be changed into another prime (99990731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49995369 + 49995370.

It is an arithmetic number, because the mean of its divisors is an integer number (49995370).

Almost surely, 2^99990739 is an apocalyptic number.

99990739 is a deficient number, since it is larger than the sum of its proper divisors (1).

99990739 is an equidigital number, since it uses as much as digits as its factorization.

99990739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1240029, while the sum is 55.

The square root of 99990739 is about 9999.5369392787. The cubic root of 99990739 is about 464.1445543342.

The spelling of 99990739 in words is "ninety-nine million, nine hundred ninety thousand, seven hundred thirty-nine".