213789497 has 4 divisors (see below), whose sum is σ = 213991680. Its totient is φ = 213587316.

The previous prime is 213789493. The next prime is 213789517. The reversal of 213789497 is 794987312.

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.

It is a cyclic number.

It is not a de Polignac number, because 213789497 - 2² = 213789493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213789493) 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, 99497 + ... + 101622.

It is an arithmetic number, because the mean of its divisors is an integer number (53497920).

Almost surely, 2^213789497 is an apocalyptic number.

It is an amenable number.

213789497 is a deficient number, since it is larger than the sum of its proper divisors (202183).

213789497 is a wasteful number, since it uses less digits than its factorization.

213789497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202182.

The product of its digits is 762048, while the sum is 50.

The square root of 213789497 is about 14621.5422237191. The cubic root of 213789497 is about 597.9462159359.

The spelling of 213789497 in words is "two hundred thirteen million, seven hundred eighty-nine thousand, four hundred ninety-seven".