213490397 has 8 divisors (see below), whose sum is σ = 223483392. Its totient is φ = 203691600.

The previous prime is 213490367. The next prime is 213490411. The reversal of 213490397 is 793094312.

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

It is a cyclic number.

It is not a de Polignac number, because 213490397 - 2¹⁴ = 213474013 is a prime.

It is a super-2 number, since 2×213490397² = 91156299222435218, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213490397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213490337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46298 + ... + 50699.

It is an arithmetic number, because the mean of its divisors is an integer number (27935424).

Almost surely, 2^213490397 is an apocalyptic number.

It is an amenable number.

213490397 is a deficient number, since it is larger than the sum of its proper divisors (9992995).

213490397 is an equidigital number, since it uses as much as digits as its factorization.

213490397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97099.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 213490397 is about 14611.3105846122. The cubic root of 213490397 is about 597.6672356232.

The spelling of 213490397 in words is "two hundred thirteen million, four hundred ninety thousand, three hundred ninety-seven".