243141649 has 9 divisors (see below), whose sum is σ = 251738409. Its totient is φ = 234830580.

The previous prime is 243141637. The next prime is 243141683. The reversal of 243141649 is 946141342.

The square root of 243141649 is 15593.

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

It is not a de Polignac number, because 243141649 - 2⁵ = 243141617 is a prime.

It is a super-2 number, since 2×243141649² = 118235722956878402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243141629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 483132 + ... + 483634.

Almost surely, 2^243141649 is an apocalyptic number.

243141649 is the 15593-rd square number.

243141649 is the 7797-th centered octagonal number.

It is an amenable number.

243141649 is a deficient number, since it is larger than the sum of its proper divisors (8596760).

243141649 is an frugal number, since it uses more digits than its factorization.

243141649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068 (or 534 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The cubic root of 243141649 is about 624.1463751301.

Multiplying 243141649 by its product of digits (20736), we get a square (5041785233664 = 2245392²).

The spelling of 243141649 in words is "two hundred forty-three million, one hundred forty-one thousand, six hundred forty-nine".