731889261 has 12 divisors (see below), whose sum is σ = 1091276160. Its totient is φ = 472186440.

The previous prime is 731889251. The next prime is 731889281. The reversal of 731889261 is 162988137.

It is not a de Polignac number, because 731889261 - 2¹³ = 731881069 is a prime.

It is a super-2 number, since 2×731889261² = 1071323780734252242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731889241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1311351 + ... + 1311908.

It is an arithmetic number, because the mean of its divisors is an integer number (90939680).

Almost surely, 2^731889261 is an apocalyptic number.

It is an amenable number.

731889261 is a deficient number, since it is larger than the sum of its proper divisors (359386899).

731889261 is a wasteful number, since it uses less digits than its factorization.

731889261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2623296 (or 2623293 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 731889261 is about 27053.4519239228. The cubic root of 731889261 is about 901.1874289545.

The spelling of 731889261 in words is "seven hundred thirty-one million, eight hundred eighty-nine thousand, two hundred sixty-one".