401699678 has 4 divisors (see below), whose sum is σ = 602549520. Its totient is φ = 200849838.

The previous prime is 401699657. The next prime is 401699687. The reversal of 401699678 is 876996104.

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

It is a super-2 number, since 2×401699678² = 322725262610607368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100424918 + ... + 100424921.

It is an arithmetic number, because the mean of its divisors is an integer number (150637380).

Almost surely, 2^401699678 is an apocalyptic number.

401699678 is a deficient number, since it is larger than the sum of its proper divisors (200849842).

401699678 is a wasteful number, since it uses less digits than its factorization.

401699678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200849841.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 401699678 is about 20042.4469065032. The cubic root of 401699678 is about 737.8484362534.

The spelling of 401699678 in words is "four hundred one million, six hundred ninety-nine thousand, six hundred seventy-eight".