1213910339 has 4 divisors (see below), whose sum is σ = 1242140856. Its totient is φ = 1185679824.

The previous prime is 1213910317. The next prime is 1213910387. The reversal of 1213910339 is 9330193121.

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-1213910339 is a prime.

It is a super-2 number, since 2×1213910339² = 2947156622262189842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213910539) 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, 14115194 + ... + 14115279.

It is an arithmetic number, because the mean of its divisors is an integer number (310535214).

Almost surely, 2^1213910339 is an apocalyptic number.

1213910339 is a deficient number, since it is larger than the sum of its proper divisors (28230517).

1213910339 is an equidigital number, since it uses as much as digits as its factorization.

1213910339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28230516.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 1213910339 is about 34841.2160953087. The cubic root of 1213910339 is about 1066.7488994003.

The spelling of 1213910339 in words is "one billion, two hundred thirteen million, nine hundred ten thousand, three hundred thirty-nine".