61386605 has 8 divisors (see below), whose sum is σ = 84187392. Its totient is φ = 42093648.

The previous prime is 61386599. The next prime is 61386613. The reversal of 61386605 is 50668316.

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

It is a cyclic number.

It is not a de Polignac number, because 61386605 - 2¹⁸ = 61124461 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 1753903 = 61386605 / (6 + 1 + 3 + 8 + 6 + 6 + 0 + 5).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 876917 + ... + 876986.

It is an arithmetic number, because the mean of its divisors is an integer number (10523424).

Almost surely, 2^61386605 is an apocalyptic number.

It is an amenable number.

61386605 is a deficient number, since it is larger than the sum of its proper divisors (22800787).

61386605 is a wasteful number, since it uses less digits than its factorization.

61386605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753915.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 61386605 is about 7834.9604338503. The cubic root of 61386605 is about 394.4795902618.

The spelling of 61386605 in words is "sixty-one million, three hundred eighty-six thousand, six hundred five".