403678081 has 2 divisors, whose sum is σ = 403678082. Its totient is φ = 403678080.

The previous prime is 403678061. The next prime is 403678111. The reversal of 403678081 is 180876304.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401601600 + 2076481 = 20040^2 + 1441^2 .

It is a cyclic number.

It is not a de Polignac number, because 403678081 - 2¹⁵ = 403645313 is a prime.

It is a super-2 number, since 2×403678081² = 325911986159685122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 403678081.

It is not a weakly prime, because it can be changed into another prime (403678021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201839040 + 201839041.

It is an arithmetic number, because the mean of its divisors is an integer number (201839041).

Almost surely, 2^403678081 is an apocalyptic number.

It is an amenable number.

403678081 is a deficient number, since it is larger than the sum of its proper divisors (1).

403678081 is an equidigital number, since it uses as much as digits as its factorization.

403678081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 403678081 is about 20091.7416119161. The cubic root of 403678081 is about 739.0577738876.

The spelling of 403678081 in words is "four hundred three million, six hundred seventy-eight thousand, eighty-one".