1297837878 has 16 divisors (see below), whose sum is σ = 2679407616. Its totient is φ = 418657320.

The previous prime is 1297837867. The next prime is 1297837913. The reversal of 1297837878 is 8787387921.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3488626 + ... + 3488997.

It is an arithmetic number, because the mean of its divisors is an integer number (167462976).

Almost surely, 2^1297837878 is an apocalyptic number.

1297837878 is an abundant number, since it is smaller than the sum of its proper divisors (1381569738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1297837878 is a wasteful number, since it uses less digits than its factorization.

1297837878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6977659.

The product of its digits is 9483264, while the sum is 60.

The square root of 1297837878 is about 36025.5170400093. The cubic root of 1297837878 is about 1090.7874897325.

The spelling of 1297837878 in words is "one billion, two hundred ninety-seven million, eight hundred thirty-seven thousand, eight hundred seventy-eight".