401779847 has 8 divisors (see below), whose sum is σ = 479141376. Its totient is φ = 329409432.

The previous prime is 401779823. The next prime is 401779879. The reversal of 401779847 is 748977104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 401779847 - 2¹⁴ = 401763463 is a prime.

It is a super-2 number, since 2×401779847² = 322854090910686818, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401779897) 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 7 ways as a sum of consecutive naturals, for example, 1247603 + ... + 1247924.

It is an arithmetic number, because the mean of its divisors is an integer number (59892672).

Almost surely, 2^401779847 is an apocalyptic number.

401779847 is a deficient number, since it is larger than the sum of its proper divisors (77361529).

401779847 is a wasteful number, since it uses less digits than its factorization.

401779847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495557.

The product of its (nonzero) digits is 395136, while the sum is 47.

The square root of 401779847 is about 20044.4467870780. The cubic root of 401779847 is about 737.8975182251.

The spelling of 401779847 in words is "four hundred one million, seven hundred seventy-nine thousand, eight hundred forty-seven".