223420957 has 2 divisors, whose sum is σ = 223420958. Its totient is φ = 223420956.

The previous prime is 223420949. The next prime is 223421039. The reversal of 223420957 is 759024322.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188622756 + 34798201 = 13734^2 + 5899^2 .

It is a cyclic number.

It is not a de Polignac number, because 223420957 - 2³ = 223420949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223420907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111710478 + 111710479.

It is an arithmetic number, because the mean of its divisors is an integer number (111710479).

Almost surely, 2^223420957 is an apocalyptic number.

It is an amenable number.

223420957 is a deficient number, since it is larger than the sum of its proper divisors (1).

223420957 is an equidigital number, since it uses as much as digits as its factorization.

223420957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 223420957 is about 14947.2725605710. The cubic root of 223420957 is about 606.7940345961.

The spelling of 223420957 in words is "two hundred twenty-three million, four hundred twenty thousand, nine hundred fifty-seven".