99739621739 has 8 divisors (see below), whose sum is σ = 104311072512. Its totient is φ = 95187749800.

The previous prime is 99739621733. The next prime is 99739621759. The reversal of 99739621739 is 93712693799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99739621739 - 2²⁴ = 99722844523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99739621733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4884287 + ... + 4904664.

It is an arithmetic number, because the mean of its divisors is an integer number (13038884064).

Almost surely, 2^99739621739 is an apocalyptic number.

99739621739 is a deficient number, since it is larger than the sum of its proper divisors (4571450773).

99739621739 is a wasteful number, since it uses less digits than its factorization.

99739621739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9789417.

The product of its digits is 34720812, while the sum is 65.

The spelling of 99739621739 in words is "ninety-nine billion, seven hundred thirty-nine million, six hundred twenty-one thousand, seven hundred thirty-nine".