401040677 has 2 divisors, whose sum is σ = 401040678. Its totient is φ = 401040676.

The previous prime is 401040637. The next prime is 401040691. The reversal of 401040677 is 776040104.

It is a happy number.

It is a Cunningham number, because it is equal to 20026²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 401040676 + 1 = 20026^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 401040677 - 2¹⁴ = 401024293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401040617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200520338 + 200520339.

It is an arithmetic number, because the mean of its divisors is an integer number (200520339).

Almost surely, 2^401040677 is an apocalyptic number.

It is an amenable number.

401040677 is a deficient number, since it is larger than the sum of its proper divisors (1).

401040677 is an equidigital number, since it uses as much as digits as its factorization.

401040677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 401040677 is about 20026.0000249675. Note that the first 4 decimals coincide. The cubic root of 401040677 is about 737.4447275248. Note that the first 3 decimals are identical.

The spelling of 401040677 in words is "four hundred one million, forty thousand, six hundred seventy-seven".