1997269497 has 24 divisors (see below), whose sum is σ = 3056516424. Its totient is φ = 1252422144.

The previous prime is 1997269489. The next prime is 1997269511. The reversal of 1997269497 is 7949627991.

1997269497 is a `hidden beast` number, since 19 + 9 + 72 + 69 + 497 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 93779856 + 1903489641 = 9684^2 + 43629^2 .

It is not a de Polignac number, because 1997269497 - 2³ = 1997269489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1997269427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 347983 + ... + 353675.

It is an arithmetic number, because the mean of its divisors is an integer number (127354851).

Almost surely, 2^1997269497 is an apocalyptic number.

1997269497 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1997269497 is a deficient number, since it is larger than the sum of its proper divisors (1059246927).

1997269497 is a wasteful number, since it uses less digits than its factorization.

1997269497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8009 (or 8006 counting only the distinct ones).

The product of its digits is 15431472, while the sum is 63.

The square root of 1997269497 is about 44690.8211716903. The cubic root of 1997269497 is about 1259.3474190644.

The spelling of 1997269497 in words is "one billion, nine hundred ninety-seven million, two hundred sixty-nine thousand, four hundred ninety-seven".