272629981 has 4 divisors (see below), whose sum is σ = 293601532. Its totient is φ = 251658432.

The previous prime is 272629927. The next prime is 272630009. The reversal of 272629981 is 189926272.

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 83429956 + 189200025 = 9134^2 + 13755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-272629981 is a prime.

It is a super-2 number, since 2×272629981² = 148654213080120722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (272629681) 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, 10485756 + ... + 10485781.

It is an arithmetic number, because the mean of its divisors is an integer number (73400383).

Almost surely, 2^272629981 is an apocalyptic number.

It is an amenable number.

272629981 is a deficient number, since it is larger than the sum of its proper divisors (20971551).

272629981 is a wasteful number, since it uses less digits than its factorization.

272629981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20971550.

The product of its digits is 217728, while the sum is 46.

The square root of 272629981 is about 16511.5105608179. The cubic root of 272629981 is about 648.4221936535.

The spelling of 272629981 in words is "two hundred seventy-two million, six hundred twenty-nine thousand, nine hundred eighty-one".