1391494859 has 8 divisors (see below), whose sum is σ = 1430518320. Its totient is φ = 1352713600.

The previous prime is 1391494823. The next prime is 1391494883. The reversal of 1391494859 is 9584941931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1391494859 - 2⁸ = 1391494603 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1391494859.

It is not an unprimeable number, because it can be changed into a prime (1391494459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48869 + ... + 71910.

It is an arithmetic number, because the mean of its divisors is an integer number (178814790).

Almost surely, 2^1391494859 is an apocalyptic number.

1391494859 is a deficient number, since it is larger than the sum of its proper divisors (39023461).

1391494859 is a wasteful number, since it uses less digits than its factorization.

1391494859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121101.

The product of its digits is 1399680, while the sum is 53.

The square root of 1391494859 is about 37302.7459981165. The cubic root of 1391494859 is about 1116.4189563958.

The spelling of 1391494859 in words is "one billion, three hundred ninety-one million, four hundred ninety-four thousand, eight hundred fifty-nine".