1497394109 has 2 divisors, whose sum is σ = 1497394110. Its totient is φ = 1497394108.

The previous prime is 1497394079. The next prime is 1497394111. The reversal of 1497394109 is 9014937941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 848265625 + 649128484 = 29125^2 + 25478^2 .

It is a cyclic number.

It is not a de Polignac number, because 1497394109 - 2⁸ = 1497393853 is a prime.

It is a Sophie Germain prime.

Together with 1497394111, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1497394909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 748697054 + 748697055.

It is an arithmetic number, because the mean of its divisors is an integer number (748697055).

Almost surely, 2^1497394109 is an apocalyptic number.

It is an amenable number.

1497394109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1497394109 is an equidigital number, since it uses as much as digits as its factorization.

1497394109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 1497394109 is about 38696.1769300276. The cubic root of 1497394109 is about 1144.0509693027.

The spelling of 1497394109 in words is "one billion, four hundred ninety-seven million, three hundred ninety-four thousand, one hundred nine".