401929873 has 8 divisors (see below), whose sum is σ = 403961000. Its totient is φ = 399904128.

The previous prime is 401929859. The next prime is 401929903. The reversal of 401929873 is 378929104.

It can be written as a sum of positive squares in 4 ways, for example, as 7569 + 401922304 = 87^2 + 20048^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401929873 is a prime.

It is a super-2 number, since 2×401929873² = 323095245619592258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401929373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258703 + ... + 260251.

It is an arithmetic number, because the mean of its divisors is an integer number (50495125).

Almost surely, 2^401929873 is an apocalyptic number.

It is an amenable number.

401929873 is a deficient number, since it is larger than the sum of its proper divisors (2031127).

401929873 is a wasteful number, since it uses less digits than its factorization.

401929873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2691.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 401929873 is about 20048.1887710586. The cubic root of 401929873 is about 737.9893513004.

The spelling of 401929873 in words is "four hundred one million, nine hundred twenty-nine thousand, eight hundred seventy-three".