213349797 has 6 divisors (see below), whose sum is σ = 308171942. Its totient is φ = 142233192.

The previous prime is 213349793. The next prime is 213349819. The reversal of 213349797 is 797943312.

213349797 is a `hidden beast` number, since 213 + 349 + 7 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 144144036 + 69205761 = 12006^2 + 8319^2 .

It is not a de Polignac number, because 213349797 - 2² = 213349793 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 (213349793) 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 5 ways as a sum of consecutive naturals, for example, 11852758 + ... + 11852775.

Almost surely, 2^213349797 is an apocalyptic number.

It is an amenable number.

213349797 is a deficient number, since it is larger than the sum of its proper divisors (94822145).

213349797 is a wasteful number, since it uses less digits than its factorization.

213349797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23705539 (or 23705536 counting only the distinct ones).

The product of its digits is 285768, while the sum is 45.

The square root of 213349797 is about 14606.4984510320. The cubic root of 213349797 is about 597.5360033860.

The spelling of 213349797 in words is "two hundred thirteen million, three hundred forty-nine thousand, seven hundred ninety-seven".