101405944249 has 3 divisors (see below), whose sum is σ = 101406262693. Its totient is φ = 101405625806.

The previous prime is 101405944247. The next prime is 101405944291. The reversal of 101405944249 is 942449504101.

The square root of 101405944249 is 318443.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 101405944249 - 2¹ = 101405944247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101405944247) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 159222 + ... + 477664.

Almost surely, 2^101405944249 is an apocalyptic number.

101405944249 is the 318443-rd square number.

101405944249 is the 159222-nd centered octagonal number.

It is an amenable number.

101405944249 is a deficient number, since it is larger than the sum of its proper divisors (318444).

101405944249 is an frugal number, since it uses more digits than its factorization.

101405944249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636886 (or 318443 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 101405944249 in words is "one hundred one billion, four hundred five million, nine hundred forty-four thousand, two hundred forty-nine".