1297899078 has 32 divisors (see below), whose sum is σ = 3029750784. Its totient is φ = 362937792.

The previous prime is 1297899067. The next prime is 1297899179. The reversal of 1297899078 is 8709987921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326775 + ... + 330722.

It is an arithmetic number, because the mean of its divisors is an integer number (94679712).

Almost surely, 2^1297899078 is an apocalyptic number.

1297899078 is an abundant number, since it is smaller than the sum of its proper divisors (1731851706).

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

1297899078 is a wasteful number, since it uses less digits than its factorization.

1297899078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657556.

The product of its (nonzero) digits is 4572288, while the sum is 60.

The square root of 1297899078 is about 36026.3664279372. The cubic root of 1297899078 is about 1090.8046349518.

The spelling of 1297899078 in words is "one billion, two hundred ninety-seven million, eight hundred ninety-nine thousand, seventy-eight".