244172691 has 32 divisors (see below), whose sum is σ = 420211200. Its totient is φ = 137233440.

The previous prime is 244172689. The next prime is 244172699. The reversal of 244172691 is 196271442.

It is a happy number.

It is not a de Polignac number, because 244172691 - 2¹ = 244172689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (244172699) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 940 + ... + 22118.

It is an arithmetic number, because the mean of its divisors is an integer number (13131600).

Almost surely, 2^244172691 is an apocalyptic number.

244172691 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

244172691 is a deficient number, since it is larger than the sum of its proper divisors (176038509).

244172691 is a wasteful number, since it uses less digits than its factorization.

244172691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21256 (or 21250 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 244172691 is about 15626.0260783092. The cubic root of 244172691 is about 625.0273617888.

The spelling of 244172691 in words is "two hundred forty-four million, one hundred seventy-two thousand, six hundred ninety-one".