401880769 has 2 divisors, whose sum is σ = 401880770. Its totient is φ = 401880768.

The previous prime is 401880757. The next prime is 401880779. The reversal of 401880769 is 967088104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 392040000 + 9840769 = 19800^2 + 3137^2 .

It is a cyclic number.

It is not a de Polignac number, because 401880769 - 2⁵ = 401880737 is a prime.

It is a super-2 number, since 2×401880769² = 323016304984062722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (401880779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200940384 + 200940385.

It is an arithmetic number, because the mean of its divisors is an integer number (200940385).

Almost surely, 2^401880769 is an apocalyptic number.

It is an amenable number.

401880769 is a deficient number, since it is larger than the sum of its proper divisors (1).

401880769 is an equidigital number, since it uses as much as digits as its factorization.

401880769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 401880769 is about 20046.9640843695. The cubic root of 401880769 is about 737.9592965509.

The spelling of 401880769 in words is "four hundred one million, eight hundred eighty thousand, seven hundred sixty-nine".