1392350891 has 4 divisors (see below), whose sum is σ = 1394457984. Its totient is φ = 1390243800.

The previous prime is 1392350851. The next prime is 1392351001. The reversal of 1392350891 is 1980532931.

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

It is a cyclic number.

It is not a de Polignac number, because 1392350891 - 2¹⁴ = 1392334507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1392350831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1052555 + ... + 1053876.

It is an arithmetic number, because the mean of its divisors is an integer number (348614496).

Almost surely, 2^1392350891 is an apocalyptic number.

1392350891 is a deficient number, since it is larger than the sum of its proper divisors (2107093).

1392350891 is an equidigital number, since it uses as much as digits as its factorization.

1392350891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107092.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 1392350891 is about 37314.2183490422. The cubic root of 1392350891 is about 1116.6478455975.

The spelling of 1392350891 in words is "one billion, three hundred ninety-two million, three hundred fifty thousand, eight hundred ninety-one".