401396543 has 2 divisors, whose sum is σ = 401396544. Its totient is φ = 401396542.

The previous prime is 401396509. The next prime is 401396557. The reversal of 401396543 is 345693104.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401396543 - 2¹² = 401392447 is a prime.

It is a super-2 number, since 2×401396543² = 322238369464701698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401396563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200698271 + 200698272.

It is an arithmetic number, because the mean of its divisors is an integer number (200698272).

Almost surely, 2^401396543 is an apocalyptic number.

401396543 is a deficient number, since it is larger than the sum of its proper divisors (1).

401396543 is an equidigital number, since it uses as much as digits as its factorization.

401396543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 401396543 is about 20034.8831541389. The cubic root of 401396543 is about 737.6627884642.

The spelling of 401396543 in words is "four hundred one million, three hundred ninety-six thousand, five hundred forty-three".