382903991 has 2 divisors, whose sum is σ = 382903992. Its totient is φ = 382903990.

The previous prime is 382903973. The next prime is 382903993. The reversal of 382903991 is 199309283.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 382903991 - 2¹⁴ = 382887607 is a prime.

It is a Sophie Germain prime.

Together with 382903993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (382903993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191451995 + 191451996.

It is an arithmetic number, because the mean of its divisors is an integer number (191451996).

Almost surely, 2^382903991 is an apocalyptic number.

382903991 is the 10460-th centered heptagonal number.

382903991 is a deficient number, since it is larger than the sum of its proper divisors (1).

382903991 is an equidigital number, since it uses as much as digits as its factorization.

382903991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 382903991 is about 19567.9327216750. The cubic root of 382903991 is about 726.1560571616.

The spelling of 382903991 in words is "three hundred eighty-two million, nine hundred three thousand, nine hundred ninety-one".