1290170213 has 4 divisors (see below), whose sum is σ = 1291727340. Its totient is φ = 1288613088.

The previous prime is 1290170209. The next prime is 1290170293. The reversal of 1290170213 is 3120710921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 703416484 + 586753729 = 26522^2 + 24223^2 .

It is a cyclic number.

It is not a de Polignac number, because 1290170213 - 2² = 1290170209 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 (1290170293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 777320 + ... + 778977.

It is an arithmetic number, because the mean of its divisors is an integer number (322931835).

Almost surely, 2^1290170213 is an apocalyptic number.

It is an amenable number.

1290170213 is a deficient number, since it is larger than the sum of its proper divisors (1557127).

1290170213 is an equidigital number, since it uses as much as digits as its factorization.

1290170213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557126.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 1290170213 is about 35918.9394748787. The cubic root of 1290170213 is about 1088.6351103392.

The spelling of 1290170213 in words is "one billion, two hundred ninety million, one hundred seventy thousand, two hundred thirteen".