1311597870 has 32 divisors (see below), whose sum is σ = 3434002560. Its totient is φ = 317963040.

The previous prime is 1311597869. The next prime is 1311597871. The reversal of 1311597870 is 787951131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1311597869) and next prime (1311597871).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311597871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1986940 + ... + 1987599.

It is an arithmetic number, because the mean of its divisors is an integer number (107312580).

Almost surely, 2^1311597870 is an apocalyptic number.

1311597870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311597870 is an abundant number, since it is smaller than the sum of its proper divisors (2122404690).

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

1311597870 is a wasteful number, since it uses less digits than its factorization.

1311597870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3974560.

The product of its (nonzero) digits is 52920, while the sum is 42.

The square root of 1311597870 is about 36215.9891484411. The cubic root of 1311597870 is about 1094.6288769627.

The spelling of 1311597870 in words is "one billion, three hundred eleven million, five hundred ninety-seven thousand, eight hundred seventy".