438931963 has 2 divisors, whose sum is σ = 438931964. Its totient is φ = 438931962.

The previous prime is 438931951. The next prime is 438931973. The reversal of 438931963 is 369139834.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438931963 is a prime.

It is a super-2 number, since 2×438931963² = 385322536286066738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (438931903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219465981 + 219465982.

It is an arithmetic number, because the mean of its divisors is an integer number (219465982).

Almost surely, 2^438931963 is an apocalyptic number.

438931963 is a deficient number, since it is larger than the sum of its proper divisors (1).

438931963 is an equidigital number, since it uses as much as digits as its factorization.

438931963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 46.

The square root of 438931963 is about 20950.7031624239. The cubic root of 438931963 is about 759.9745853690.

The spelling of 438931963 in words is "four hundred thirty-eight million, nine hundred thirty-one thousand, nine hundred sixty-three".