401998177 has 4 divisors (see below), whose sum is σ = 459426496. Its totient is φ = 344569860.

The previous prime is 401998169. The next prime is 401998187. The reversal of 401998177 is 771899104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 401998177 - 2³ = 401998169 is a prime.

It is a super-2 number, since 2×401998177² = 323205068622646658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401998187) 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, 28714149 + ... + 28714162.

It is an arithmetic number, because the mean of its divisors is an integer number (114856624).

Almost surely, 2^401998177 is an apocalyptic number.

It is an amenable number.

401998177 is a deficient number, since it is larger than the sum of its proper divisors (57428319).

401998177 is an equidigital number, since it uses as much as digits as its factorization.

401998177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57428318.

The product of its (nonzero) digits is 127008, while the sum is 46.

The square root of 401998177 is about 20049.8921942239. The cubic root of 401998177 is about 738.0311535922.

The spelling of 401998177 in words is "four hundred one million, nine hundred ninety-eight thousand, one hundred seventy-seven".