61868369 has 4 divisors (see below), whose sum is σ = 61884144. Its totient is φ = 61852596.

The previous prime is 61868353. The next prime is 61868371. The reversal of 61868369 is 96386816.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 61868369 - 2⁴ = 61868353 is a prime.

It is a super-3 number, since 3×61868369³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61868399) 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, 3074 + ... + 11540.

It is an arithmetic number, because the mean of its divisors is an integer number (15471036).

Almost surely, 2^61868369 is an apocalyptic number.

It is an amenable number.

61868369 is a deficient number, since it is larger than the sum of its proper divisors (15775).

61868369 is an equidigital number, since it uses as much as digits as its factorization.

61868369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15774.

The product of its digits is 373248, while the sum is 47.

The square root of 61868369 is about 7865.6448559543. The cubic root of 61868369 is about 395.5088650750.

The spelling of 61868369 in words is "sixty-one million, eight hundred sixty-eight thousand, three hundred sixty-nine".