39499899493 has 2 divisors, whose sum is σ = 39499899494. Its totient is φ = 39499899492.

The previous prime is 39499899409. The next prime is 39499899533.

39499899493 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22374774724 + 17125124769 = 149582^2 + 130863^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 39499899493 - 2⁹ = 39499898981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39499899403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19749949746 + 19749949747.

It is an arithmetic number, because the mean of its divisors is an integer number (19749949747).

Almost surely, 2^39499899493 is an apocalyptic number.

It is an amenable number.

39499899493 is a deficient number, since it is larger than the sum of its proper divisors (1).

39499899493 is an equidigital number, since it uses as much as digits as its factorization.

39499899493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612220032, while the sum is 76.

The spelling of 39499899493 in words is "thirty-nine billion, four hundred ninety-nine million, eight hundred ninety-nine thousand, four hundred ninety-three".