395401890943 has 2 divisors, whose sum is σ = 395401890944. Its totient is φ = 395401890942.

The previous prime is 395401890901. The next prime is 395401890953. The reversal of 395401890943 is 349098104593.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 395401890943 - 2²¹ = 395399793791 is a prime.

It is a super-2 number, since 2×395401890943² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (395401890953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197700945471 + 197700945472.

It is an arithmetic number, because the mean of its divisors is an integer number (197700945472).

Almost surely, 2^395401890943 is an apocalyptic number.

395401890943 is a deficient number, since it is larger than the sum of its proper divisors (1).

395401890943 is an equidigital number, since it uses as much as digits as its factorization.

395401890943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4199040, while the sum is 55.

The spelling of 395401890943 in words is "three hundred ninety-five billion, four hundred one million, eight hundred ninety thousand, nine hundred forty-three".