1497407491 has 2 divisors, whose sum is σ = 1497407492. Its totient is φ = 1497407490.

The previous prime is 1497407473. The next prime is 1497407497. The reversal of 1497407491 is 1947047941.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1947047941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1497407491 - 2⁷ = 1497407363 is a prime.

It is not a weakly prime, because it can be changed into another prime (1497407497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 748703745 + 748703746.

It is an arithmetic number, because the mean of its divisors is an integer number (748703746).

Almost surely, 2^1497407491 is an apocalyptic number.

1497407491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1497407491 is an equidigital number, since it uses as much as digits as its factorization.

1497407491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 1497407491 is about 38696.3498407796. The cubic root of 1497407491 is about 1144.0543773666.

The spelling of 1497407491 in words is "one billion, four hundred ninety-seven million, four hundred seven thousand, four hundred ninety-one".