423920237 has 4 divisors (see below), whose sum is σ = 456529500. Its totient is φ = 391310976.

The previous prime is 423920227. The next prime is 423920239. The reversal of 423920237 is 732029324.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 243796996 + 180123241 = 15614^2 + 13421^2 .

It is a cyclic number.

It is not a de Polignac number, because 423920237 - 2¹⁶ = 423854701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423920239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16304612 + ... + 16304637.

It is an arithmetic number, because the mean of its divisors is an integer number (114132375).

Almost surely, 2^423920237 is an apocalyptic number.

It is an amenable number.

423920237 is a deficient number, since it is larger than the sum of its proper divisors (32609263).

423920237 is a wasteful number, since it uses less digits than its factorization.

423920237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32609262.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 423920237 is about 20589.3233740208. The cubic root of 423920237 is about 751.2100389872.

The spelling of 423920237 in words is "four hundred twenty-three million, nine hundred twenty thousand, two hundred thirty-seven".