1310220997 has 4 divisors (see below), whose sum is σ = 1320222816. Its totient is φ = 1300219180.

The previous prime is 1310220959. The next prime is 1310221037. The reversal of 1310220997 is 7990220131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7990220131 = 1151 ⋅6941981.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1310220997 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 (1310220097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5000713 + ... + 5000974.

It is an arithmetic number, because the mean of its divisors is an integer number (330055704).

Almost surely, 2^1310220997 is an apocalyptic number.

It is an amenable number.

1310220997 is a deficient number, since it is larger than the sum of its proper divisors (10001819).

1310220997 is a wasteful number, since it uses less digits than its factorization.

1310220997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10001818.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 1310220997 is about 36196.9749702928. The cubic root of 1310220997 is about 1094.2457075276.

The spelling of 1310220997 in words is "one billion, three hundred ten million, two hundred twenty thousand, nine hundred ninety-seven".