213764397 has 16 divisors (see below), whose sum is σ = 355348992. Its totient is φ = 111046320.

The previous prime is 213764393. The next prime is 213764431. The reversal of 213764397 is 793467312.

It is not a de Polignac number, because 213764397 - 2² = 213764393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213764393) 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, 462463 + ... + 462924.

It is an arithmetic number, because the mean of its divisors is an integer number (22209312).

Almost surely, 2^213764397 is an apocalyptic number.

It is an amenable number.

213764397 is a deficient number, since it is larger than the sum of its proper divisors (141584595).

213764397 is a wasteful number, since it uses less digits than its factorization.

213764397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925408.

The product of its digits is 190512, while the sum is 42.

The square root of 213764397 is about 14620.6838759341. The cubic root of 213764397 is about 597.9228143538.

The spelling of 213764397 in words is "two hundred thirteen million, seven hundred sixty-four thousand, three hundred ninety-seven".