1447640791 has 2 divisors, whose sum is σ = 1447640792. Its totient is φ = 1447640790.

The previous prime is 1447640767. The next prime is 1447640807. The reversal of 1447640791 is 1970467441.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1447640791 - 2²⁹ = 910769879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1447640731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 723820395 + 723820396.

It is an arithmetic number, because the mean of its divisors is an integer number (723820396).

Almost surely, 2^1447640791 is an apocalyptic number.

1447640791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1447640791 is an equidigital number, since it uses as much as digits as its factorization.

1447640791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 1447640791 is about 38047.8749866533. The cubic root of 1447640791 is about 1131.2370067553.

The spelling of 1447640791 in words is "one billion, four hundred forty-seven million, six hundred forty thousand, seven hundred ninety-one".