423031402 has 4 divisors (see below), whose sum is σ = 634547106. Its totient is φ = 211515700.

The previous prime is 423031391. The next prime is 423031421. The reversal of 423031402 is 204130324.

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., 298909521 + 124121881 = 17289^2 + 11141^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 423031402.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105757849 + ... + 105757852.

Almost surely, 2^423031402 is an apocalyptic number.

423031402 is a deficient number, since it is larger than the sum of its proper divisors (211515704).

423031402 is a wasteful number, since it uses less digits than its factorization.

423031402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211515703.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 423031402 is about 20567.7271957793. The cubic root of 423031402 is about 750.6846500748.

Adding to 423031402 its reverse (204130324), we get a palindrome (627161726).

The spelling of 423031402 in words is "four hundred twenty-three million, thirty-one thousand, four hundred two".