481269991 has 2 divisors, whose sum is σ = 481269992. Its totient is φ = 481269990.

The previous prime is 481269977. The next prime is 481270003. The reversal of 481269991 is 199962184.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 481269991 - 2⁵ = 481269959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (481269941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 240634995 + 240634996.

It is an arithmetic number, because the mean of its divisors is an integer number (240634996).

Almost surely, 2^481269991 is an apocalyptic number.

481269991 is a deficient number, since it is larger than the sum of its proper divisors (1).

481269991 is an equidigital number, since it uses as much as digits as its factorization.

481269991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 49.

The square root of 481269991 is about 21937.8666009254. The cubic root of 481269991 is about 783.6634543786.

The spelling of 481269991 in words is "four hundred eighty-one million, two hundred sixty-nine thousand, nine hundred ninety-one".