401659899 has 4 divisors (see below), whose sum is σ = 535546536. Its totient is φ = 267773264.

The previous prime is 401659891. The next prime is 401659913. The reversal of 401659899 is 998956104.

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

It is a cyclic number.

It is not a de Polignac number, because 401659899 - 2³ = 401659891 is a prime.

It is a super-2 number, since 2×401659899² = 322661348929380402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401659891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66943314 + ... + 66943319.

It is an arithmetic number, because the mean of its divisors is an integer number (133886634).

Almost surely, 2^401659899 is an apocalyptic number.

401659899 is a deficient number, since it is larger than the sum of its proper divisors (133886637).

401659899 is a wasteful number, since it uses less digits than its factorization.

401659899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133886636.

The product of its (nonzero) digits is 699840, while the sum is 51.

The square root of 401659899 is about 20041.4545130836. The cubic root of 401659899 is about 737.8240798802.

The spelling of 401659899 in words is "four hundred one million, six hundred fifty-nine thousand, eight hundred ninety-nine".