99142739 has 2 divisors, whose sum is σ = 99142740. Its totient is φ = 99142738.

The previous prime is 99142733. The next prime is 99142777. The reversal of 99142739 is 93724199.

It is a weak prime.

It is an emirp because it is prime and its reverse (93724199) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99142739 - 2¹² = 99138643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99142739.

It is not a weakly prime, because it can be changed into another prime (99142733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49571369 + 49571370.

It is an arithmetic number, because the mean of its divisors is an integer number (49571370).

Almost surely, 2^99142739 is an apocalyptic number.

99142739 is a deficient number, since it is larger than the sum of its proper divisors (1).

99142739 is an equidigital number, since it uses as much as digits as its factorization.

99142739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 44.

The square root of 99142739 is about 9957.0446920761. The cubic root of 99142739 is about 462.8287240818.

The spelling of 99142739 in words is "ninety-nine million, one hundred forty-two thousand, seven hundred thirty-nine".