382297991 has 2 divisors, whose sum is σ = 382297992. Its totient is φ = 382297990.

The previous prime is 382297969. The next prime is 382297999. The reversal of 382297991 is 199792283.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 382297991 - 2¹⁴ = 382281607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (382297999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191148995 + 191148996.

It is an arithmetic number, because the mean of its divisors is an integer number (191148996).

Almost surely, 2^382297991 is an apocalyptic number.

382297991 is a deficient number, since it is larger than the sum of its proper divisors (1).

382297991 is an equidigital number, since it uses as much as digits as its factorization.

382297991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 50.

The square root of 382297991 is about 19552.4420725392. The cubic root of 382297991 is about 725.7727731593.

The spelling of 382297991 in words is "three hundred eighty-two million, two hundred ninety-seven thousand, nine hundred ninety-one".