1391290893 has 12 divisors (see below), whose sum is σ = 2024102080. Its totient is φ = 920853576.

The previous prime is 1391290891. The next prime is 1391290961. The reversal of 1391290893 is 3980921931.

It is a happy number.

It is not a de Polignac number, because 1391290893 - 2¹ = 1391290891 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 (1391290891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 554821 + ... + 557322.

Almost surely, 2^1391290893 is an apocalyptic number.

It is an amenable number.

1391290893 is a deficient number, since it is larger than the sum of its proper divisors (632811187).

1391290893 is a wasteful number, since it uses less digits than its factorization.

1391290893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112288 (or 1112285 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 1391290893 is about 37300.0119705075. The cubic root of 1391290893 is about 1116.3644053173.

The spelling of 1391290893 in words is "one billion, three hundred ninety-one million, two hundred ninety thousand, eight hundred ninety-three".