39699529379 has 4 divisors (see below), whose sum is σ = 39700271520. Its totient is φ = 39698787240.

The previous prime is 39699529369. The next prime is 39699529391. The reversal of 39699529379 is 97392599693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97392599693 = 2089 ⋅46621637.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39699529379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39699529369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284024 + ... + 400085.

It is an arithmetic number, because the mean of its divisors is an integer number (9925067880).

Almost surely, 2^39699529379 is an apocalyptic number.

39699529379 is a deficient number, since it is larger than the sum of its proper divisors (742141).

39699529379 is an equidigital number, since it uses as much as digits as its factorization.

39699529379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742140.

The product of its digits is 223205220, while the sum is 71.

The spelling of 39699529379 in words is "thirty-nine billion, six hundred ninety-nine million, five hundred twenty-nine thousand, three hundred seventy-nine".