1077399391 has 2 divisors, whose sum is σ = 1077399392. Its totient is φ = 1077399390.

The previous prime is 1077399359. The next prime is 1077399437. The reversal of 1077399391 is 1939937701.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1077399391 - 2⁵ = 1077399359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1077399091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538699695 + 538699696.

It is an arithmetic number, because the mean of its divisors is an integer number (538699696).

Almost surely, 2^1077399391 is an apocalyptic number.

1077399391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1077399391 is an equidigital number, since it uses as much as digits as its factorization.

1077399391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 321489, while the sum is 49.

The square root of 1077399391 is about 32823.7625966311. The cubic root of 1077399391 is about 1025.1613915211.

The spelling of 1077399391 in words is "one billion, seventy-seven million, three hundred ninety-nine thousand, three hundred ninety-one".