363968639 has 4 divisors (see below), whose sum is σ = 369935400. Its totient is φ = 358001880.

The previous prime is 363968621. The next prime is 363968677. The reversal of 363968639 is 936869363.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936869363 = 1307 ⋅716809.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-363968639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (363968609) 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, 2983289 + ... + 2983410.

It is an arithmetic number, because the mean of its divisors is an integer number (92483850).

Almost surely, 2^363968639 is an apocalyptic number.

363968639 is a deficient number, since it is larger than the sum of its proper divisors (5966761).

363968639 is an equidigital number, since it uses as much as digits as its factorization.

363968639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5966760.

The product of its digits is 3779136, while the sum is 53.

The square root of 363968639 is about 19077.9621291164. The cubic root of 363968639 is about 713.9831922278.

The spelling of 363968639 in words is "three hundred sixty-three million, nine hundred sixty-eight thousand, six hundred thirty-nine".