401195989 has 4 divisors (see below), whose sum is σ = 401523660. Its totient is φ = 400868320.

The previous prime is 401195983. The next prime is 401196007. The reversal of 401195989 is 989591104.

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

It can be written as a sum of positive squares in 2 ways, for example, as 397803025 + 3392964 = 19945^2 + 1842^2 .

It is a cyclic number.

It is not a de Polignac number, because 401195989 - 2³ = 401195981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401195981) 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, 161992 + ... + 164449.

It is an arithmetic number, because the mean of its divisors is an integer number (100380915).

Almost surely, 2^401195989 is an apocalyptic number.

It is an amenable number.

401195989 is a deficient number, since it is larger than the sum of its proper divisors (327671).

401195989 is a wasteful number, since it uses less digits than its factorization.

401195989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327670.

The product of its (nonzero) digits is 116640, while the sum is 46.

The square root of 401195989 is about 20029.8774085115. The cubic root of 401195989 is about 737.5399125771.

It can be divided in two parts, 4011 and 95989, that added together give a 5-th power (100000 = 10⁵).

The spelling of 401195989 in words is "four hundred one million, one hundred ninety-five thousand, nine hundred eighty-nine".