401742769 has 4 divisors (see below), whose sum is σ = 401886244. Its totient is φ = 401599296.

The previous prime is 401742763. The next prime is 401742799. The reversal of 401742769 is 967247104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 221861025 + 179881744 = 14895^2 + 13412^2 .

It is a cyclic number.

It is not a de Polignac number, because 401742769 - 2¹⁷ = 401611697 is a prime.

It is a super-2 number, since 2×401742769² = 322794504887574722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401742763) 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 in 3 ways as a sum of consecutive naturals, for example, 67452 + ... + 73165.

It is an arithmetic number, because the mean of its divisors is an integer number (100471561).

Almost surely, 2^401742769 is an apocalyptic number.

It is an amenable number.

401742769 is a deficient number, since it is larger than the sum of its proper divisors (143475).

401742769 is a wasteful number, since it uses less digits than its factorization.

401742769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143474.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 401742769 is about 20043.5218711683. The cubic root of 401742769 is about 737.8748187243.

The spelling of 401742769 in words is "four hundred one million, seven hundred forty-two thousand, seven hundred sixty-nine".