382497991 has 2 divisors, whose sum is σ = 382497992. Its totient is φ = 382497990.

The previous prime is 382497961. The next prime is 382498021. The reversal of 382497991 is 199794283.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (382497961) and next prime (382498021).

It is a cyclic number.

It is not a de Polignac number, because 382497991 - 2⁵ = 382497959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (382497961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191248995 + 191248996.

It is an arithmetic number, because the mean of its divisors is an integer number (191248996).

Almost surely, 2^382497991 is an apocalyptic number.

382497991 is a deficient number, since it is larger than the sum of its proper divisors (1).

382497991 is an equidigital number, since it uses as much as digits as its factorization.

382497991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 52.

The square root of 382497991 is about 19557.5558544518. Note that the first 3 decimals coincide. The cubic root of 382497991 is about 725.8993142806.

The spelling of 382497991 in words is "three hundred eighty-two million, four hundred ninety-seven thousand, nine hundred ninety-one".