415491997 has 2 divisors, whose sum is σ = 415491998. Its totient is φ = 415491996.

The previous prime is 415491971. The next prime is 415492001. The reversal of 415491997 is 799194514.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 415303641 + 188356 = 20379^2 + 434^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-415491997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 415491997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (415491397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207745998 + 207745999.

It is an arithmetic number, because the mean of its divisors is an integer number (207745999).

Almost surely, 2^415491997 is an apocalyptic number.

It is an amenable number.

415491997 is a deficient number, since it is larger than the sum of its proper divisors (1).

415491997 is an equidigital number, since it uses as much as digits as its factorization.

415491997 is an odious number, because the sum of its binary digits is odd.

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

The square root of 415491997 is about 20383.6208020067. The cubic root of 415491997 is about 746.1982411047.

The spelling of 415491997 in words is "four hundred fifteen million, four hundred ninety-one thousand, nine hundred ninety-seven".