368648281 has 4 divisors (see below), whose sum is σ = 390333492. Its totient is φ = 346963072.

The previous prime is 368648251. The next prime is 368648299. The reversal of 368648281 is 182846863.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 182846863 = 1097 ⋅166679.

It can be written as a sum of positive squares in 2 ways, for example, as 288456256 + 80192025 = 16984^2 + 8955^2 .

It is a cyclic number.

It is not a de Polignac number, because 368648281 - 2¹³ = 368640089 is a prime.

It is a super-2 number, since 2×368648281² = 271803110168509922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (368648251) 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, 10842580 + ... + 10842613.

It is an arithmetic number, because the mean of its divisors is an integer number (97583373).

Almost surely, 2^368648281 is an apocalyptic number.

It is an amenable number.

368648281 is a deficient number, since it is larger than the sum of its proper divisors (21685211).

368648281 is a wasteful number, since it uses less digits than its factorization.

368648281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21685210.

The product of its digits is 442368, while the sum is 46.

The square root of 368648281 is about 19200.2156498306. The cubic root of 368648281 is about 717.0301284067.

It can be divided in two parts, 36864 and 8281, that multiplied together give a square (305270784 = 17472²).

The spelling of 368648281 in words is "three hundred sixty-eight million, six hundred forty-eight thousand, two hundred eighty-one".