423972237 has 16 divisors (see below), whose sum is σ = 615625920. Its totient is φ = 257972352.

The previous prime is 423972193. The next prime is 423972239. The reversal of 423972237 is 732279324.

It is not a de Polignac number, because 423972237 - 2⁶ = 423972173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 423972195 and 423972204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423972239) 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, 57603 + ... + 64544.

It is an arithmetic number, because the mean of its divisors is an integer number (38476620).

Almost surely, 2^423972237 is an apocalyptic number.

It is an amenable number.

423972237 is a deficient number, since it is larger than the sum of its proper divisors (191653683).

423972237 is a wasteful number, since it uses less digits than its factorization.

423972237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122252.

The product of its digits is 127008, while the sum is 39.

The square root of 423972237 is about 20590.5861257032. The cubic root of 423972237 is about 751.2407533540.

The spelling of 423972237 in words is "four hundred twenty-three million, nine hundred seventy-two thousand, two hundred thirty-seven".