1368624431 has 4 divisors (see below), whose sum is σ = 1370932992. Its totient is φ = 1366315872.

The previous prime is 1368624401. The next prime is 1368624449. The reversal of 1368624431 is 1344268631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1368624431 is a prime.

It is a super-2 number, since 2×1368624431² = 3746265666260147522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1368624401) 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, 1153391 + ... + 1154576.

It is an arithmetic number, because the mean of its divisors is an integer number (342733248).

Almost surely, 2^1368624431 is an apocalyptic number.

1368624431 is a deficient number, since it is larger than the sum of its proper divisors (2308561).

1368624431 is an equidigital number, since it uses as much as digits as its factorization.

1368624431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308560.

The product of its digits is 82944, while the sum is 38.

The square root of 1368624431 is about 36994.9243951113. The cubic root of 1368624431 is about 1110.2686985792.

The spelling of 1368624431 in words is "one billion, three hundred sixty-eight million, six hundred twenty-four thousand, four hundred thirty-one".