27961653 has 8 divisors (see below), whose sum is σ = 38149408. Its totient is φ = 18207504.

The previous prime is 27961643. The next prime is 27961667. The reversal of 27961653 is 35616972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27961653 - 2¹⁸ = 27699509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27961643) 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 7 ways as a sum of consecutive naturals, for example, 108250 + ... + 108507.

It is an arithmetic number, because the mean of its divisors is an integer number (4768676).

Almost surely, 2^27961653 is an apocalyptic number.

It is an amenable number.

27961653 is a deficient number, since it is larger than the sum of its proper divisors (10187755).

27961653 is a wasteful number, since it uses less digits than its factorization.

27961653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216803.

The product of its digits is 68040, while the sum is 39.

The square root of 27961653 is about 5287.8779297559. The cubic root of 27961653 is about 303.5202099544.

The spelling of 27961653 in words is "twenty-seven million, nine hundred sixty-one thousand, six hundred fifty-three".