1297896887 has 8 divisors (see below), whose sum is σ = 1483971072. Its totient is φ = 1111987800.

The previous prime is 1297896883. The next prime is 1297896889. The reversal of 1297896887 is 7886987921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1297896887 - 2² = 1297896883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297896883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23939 + ... + 56292.

It is an arithmetic number, because the mean of its divisors is an integer number (185496384).

Almost surely, 2^1297896887 is an apocalyptic number.

1297896887 is a deficient number, since it is larger than the sum of its proper divisors (186074185).

1297896887 is an equidigital number, since it uses as much as digits as its factorization.

1297896887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82549.

The product of its digits is 24385536, while the sum is 65.

The square root of 1297896887 is about 36026.3360196399. The cubic root of 1297896887 is about 1090.8040211511.

The spelling of 1297896887 in words is "one billion, two hundred ninety-seven million, eight hundred ninety-six thousand, eight hundred eighty-seven".