401977 has 4 divisors (see below), whose sum is σ = 414976. Its totient is φ = 388980.

The previous prime is 401959. The next prime is 401981. The reversal of 401977 is 779104.

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 a de Polignac number, because none of the positive numbers 2^k-401977 is a prime.

It is a Duffinian number.

401977 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (401917) 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, 6453 + ... + 6514.

It is an arithmetic number, because the mean of its divisors is an integer number (103744).

2⁴⁰¹⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

401977 is a deficient number, since it is larger than the sum of its proper divisors (12999).

401977 is a wasteful number, since it uses less digits than its factorization.

401977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12998.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 401977 is about 634.0165612979. The cubic root of 401977 is about 73.8018193699.

It can be divided in two parts, 40197 and 7, that added together give a palindrome (40204).

The spelling of 401977 in words is "four hundred one thousand, nine hundred seventy-seven".