423420657 has 16 divisors (see below), whose sum is σ = 627507648. Its totient is φ = 251775680.

The previous prime is 423420631. The next prime is 423420691. The reversal of 423420657 is 756024324.

It is a cyclic number.

It is not a de Polignac number, because 423420657 - 2⁸ = 423420401 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (423420457) 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, 119298 + ... + 122795.

It is an arithmetic number, because the mean of its divisors is an integer number (39219228).

Almost surely, 2^423420657 is an apocalyptic number.

It is an amenable number.

423420657 is a deficient number, since it is larger than the sum of its proper divisors (204086991).

423420657 is a wasteful number, since it uses less digits than its factorization.

423420657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242160.

The product of its (nonzero) digits is 40320, while the sum is 33.

The square root of 423420657 is about 20577.1877816188. The cubic root of 423420657 is about 750.9148285535.

The spelling of 423420657 in words is "four hundred twenty-three million, four hundred twenty thousand, six hundred fifty-seven".