401435523893 has 2 divisors, whose sum is σ = 401435523894. Its totient is φ = 401435523892.

The previous prime is 401435523883. The next prime is 401435523901. The reversal of 401435523893 is 398325534104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 381432230404 + 20003293489 = 617602^2 + 141433^2 .

It is a cyclic number.

It is not a de Polignac number, because 401435523893 - 2⁴ = 401435523877 is a prime.

It is a super-2 number, since 2×401435523893² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401435523803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200717761946 + 200717761947.

It is an arithmetic number, because the mean of its divisors is an integer number (200717761947).

Almost surely, 2^401435523893 is an apocalyptic number.

It is an amenable number.

401435523893 is a deficient number, since it is larger than the sum of its proper divisors (1).

401435523893 is an equidigital number, since it uses as much as digits as its factorization.

401435523893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 401435523893 in words is "four hundred one billion, four hundred thirty-five million, five hundred twenty-three thousand, eight hundred ninety-three".