223642394 has 4 divisors (see below), whose sum is σ = 335463594. Its totient is φ = 111821196.

The previous prime is 223642343. The next prime is 223642411. The reversal of 223642394 is 493246322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 125731369 + 97911025 = 11213^2 + 9895^2 .

It is a super-3 number, since 3×223642394³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55910597 + ... + 55910600.

Almost surely, 2^223642394 is an apocalyptic number.

223642394 is a deficient number, since it is larger than the sum of its proper divisors (111821200).

223642394 is a wasteful number, since it uses less digits than its factorization.

223642394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111821199.

The product of its digits is 62208, while the sum is 35.

The square root of 223642394 is about 14954.6779972021. The cubic root of 223642394 is about 606.9944369901.

The spelling of 223642394 in words is "two hundred twenty-three million, six hundred forty-two thousand, three hundred ninety-four".