401949101 has 4 divisors (see below), whose sum is σ = 402101052. Its totient is φ = 401797152.

The previous prime is 401949089. The next prime is 401949103. The reversal of 401949101 is 101949104.

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 272217001 + 129732100 = 16499^2 + 11390^2 .

It is a cyclic number.

It is not a de Polignac number, because 401949101 - 2²⁶ = 334840237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401949103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71936 + ... + 77321.

It is an arithmetic number, because the mean of its divisors is an integer number (100525263).

Almost surely, 2^401949101 is an apocalyptic number.

It is an amenable number.

401949101 is a deficient number, since it is larger than the sum of its proper divisors (151951).

401949101 is a wasteful number, since it uses less digits than its factorization.

401949101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151950.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 401949101 is about 20048.6683098903. The cubic root of 401949101 is about 738.0011193839.

The spelling of 401949101 in words is "four hundred one million, nine hundred forty-nine thousand, one hundred one".