1497450991 has 2 divisors, whose sum is σ = 1497450992. Its totient is φ = 1497450990.

The previous prime is 1497450961. The next prime is 1497451003. The reversal of 1497450991 is 1990547941.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1497450991 - 2¹⁷ = 1497319919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1497450961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 748725495 + 748725496.

It is an arithmetic number, because the mean of its divisors is an integer number (748725496).

Almost surely, 2^1497450991 is an apocalyptic number.

1497450991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1497450991 is an equidigital number, since it uses as much as digits as its factorization.

1497450991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 1497450991 is about 38696.9119052154. The cubic root of 1497450991 is about 1144.0654555988.

The spelling of 1497450991 in words is "one billion, four hundred ninety-seven million, four hundred fifty thousand, nine hundred ninety-one".