423812491 has 2 divisors, whose sum is σ = 423812492. Its totient is φ = 423812490.

The previous prime is 423812443. The next prime is 423812507. The reversal of 423812491 is 194218324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 423812491 - 2¹³ = 423804299 is a prime.

It is not a weakly prime, because it can be changed into another prime (423812791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211906245 + 211906246.

It is an arithmetic number, because the mean of its divisors is an integer number (211906246).

Almost surely, 2^423812491 is an apocalyptic number.

423812491 is a deficient number, since it is larger than the sum of its proper divisors (1).

423812491 is an equidigital number, since it uses as much as digits as its factorization.

423812491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 34.

The square root of 423812491 is about 20586.7066574525. The cubic root of 423812491 is about 751.1463896431.

The spelling of 423812491 in words is "four hundred twenty-three million, eight hundred twelve thousand, four hundred ninety-one".