61386071 has 4 divisors (see below), whose sum is σ = 63045192. Its totient is φ = 59726952.

The previous prime is 61386049. The next prime is 61386077. The reversal of 61386071 is 17068316.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61386071 - 2¹⁸ = 61123927 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 (61386077) 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, 829505 + ... + 829578.

It is an arithmetic number, because the mean of its divisors is an integer number (15761298).

Almost surely, 2^61386071 is an apocalyptic number.

61386071 is a deficient number, since it is larger than the sum of its proper divisors (1659121).

61386071 is a wasteful number, since it uses less digits than its factorization.

61386071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1659120.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 61386071 is about 7834.9263557483. The cubic root of 61386071 is about 394.4784464036.

The spelling of 61386071 in words is "sixty-one million, three hundred eighty-six thousand, seventy-one".