423374991 has 16 divisors (see below), whose sum is σ = 608904576. Its totient is φ = 260117856.

The previous prime is 423374969. The next prime is 423375023. The reversal of 423374991 is 199473324.

It is not a de Polignac number, because 423374991 - 2⁶ = 423374927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423374191) 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, 16636 + ... + 33518.

It is an arithmetic number, because the mean of its divisors is an integer number (38056536).

Almost surely, 2^423374991 is an apocalyptic number.

423374991 is a deficient number, since it is larger than the sum of its proper divisors (185529585).

423374991 is a wasteful number, since it uses less digits than its factorization.

423374991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17542.

The product of its digits is 163296, while the sum is 42.

The square root of 423374991 is about 20576.0781248517. The cubic root of 423374991 is about 750.8878321463.

The spelling of 423374991 in words is "four hundred twenty-three million, three hundred seventy-four thousand, nine hundred ninety-one".