213003397 has 4 divisors (see below), whose sum is σ = 214433100. Its totient is φ = 211573696.

The previous prime is 213003379. The next prime is 213003409. The reversal of 213003397 is 793300312.

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 13883076 + 199120321 = 3726^2 + 14111^2 .

It is a cyclic number.

It is not a de Polignac number, because 213003397 - 2¹⁵ = 212970629 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 (213003317) 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, 714628 + ... + 714925.

It is an arithmetic number, because the mean of its divisors is an integer number (53608275).

Almost surely, 2^213003397 is an apocalyptic number.

It is an amenable number.

213003397 is a deficient number, since it is larger than the sum of its proper divisors (1429703).

213003397 is a wasteful number, since it uses less digits than its factorization.

213003397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429702.

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 213003397 is about 14594.6358981648. The cubic root of 213003397 is about 597.2124368012.

The spelling of 213003397 in words is "two hundred thirteen million, three thousand, three hundred ninety-seven".