1404312991 has 2 divisors, whose sum is σ = 1404312992. Its totient is φ = 1404312990.

The previous prime is 1404312983. The next prime is 1404312997. The reversal of 1404312991 is 1992134041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1404312991 - 2³ = 1404312983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1404312997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702156495 + 702156496.

It is an arithmetic number, because the mean of its divisors is an integer number (702156496).

Almost surely, 2^1404312991 is an apocalyptic number.

1404312991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1404312991 is an equidigital number, since it uses as much as digits as its factorization.

1404312991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 1404312991 is about 37474.1643135641. The cubic root of 1404312991 is about 1119.8365490109.

The spelling of 1404312991 in words is "one billion, four hundred four million, three hundred twelve thousand, nine hundred ninety-one".