461229991 has 2 divisors, whose sum is σ = 461229992. Its totient is φ = 461229990.

The previous prime is 461229961. The next prime is 461230001. The reversal of 461229991 is 199922164.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 461229991 - 2¹⁵ = 461197223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (461229961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230614995 + 230614996.

It is an arithmetic number, because the mean of its divisors is an integer number (230614996).

Almost surely, 2^461229991 is an apocalyptic number.

461229991 is a deficient number, since it is larger than the sum of its proper divisors (1).

461229991 is an equidigital number, since it uses as much as digits as its factorization.

461229991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 43.

The square root of 461229991 is about 21476.2657601362. The cubic root of 461229991 is about 772.6316828473.

The spelling of 461229991 in words is "four hundred sixty-one million, two hundred twenty-nine thousand, nine hundred ninety-one".