1390711491 has 64 divisors (see below), whose sum is σ = 2390384640. Its totient is φ = 792063360.

The previous prime is 1390711481. The next prime is 1390711549. The reversal of 1390711491 is 1941170931.

1390711491 is a `hidden beast` number, since 13 + 90 + 71 + 1 + 491 = 666.

It is not a de Polignac number, because 1390711491 - 2⁷ = 1390711363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1390711411) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 247485 + ... + 253041.

It is an arithmetic number, because the mean of its divisors is an integer number (37349760).

Almost surely, 2^1390711491 is an apocalyptic number.

1390711491 is a deficient number, since it is larger than the sum of its proper divisors (999673149).

1390711491 is a wasteful number, since it uses less digits than its factorization.

1390711491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5633 (or 5627 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 36.

The square root of 1390711491 is about 37292.2443813724. The cubic root of 1390711491 is about 1116.2094141066.

The spelling of 1390711491 in words is "one billion, three hundred ninety million, seven hundred eleven thousand, four hundred ninety-one".