61685319 has 8 divisors (see below), whose sum is σ = 84900352. Its totient is φ = 39796920.

The previous prime is 61685317. The next prime is 61685321. The reversal of 61685319 is 91358616.

It is an interprime number because it is at equal distance from previous prime (61685317) and next prime (61685321).

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

It is not a de Polignac number, because 61685319 - 2¹ = 61685317 is a prime.

It is a super-2 number, since 2×61685319² = 7610157160263522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61685317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331549 + ... + 331734.

It is an arithmetic number, because the mean of its divisors is an integer number (10612544).

Almost surely, 2^61685319 is an apocalyptic number.

61685319 is a deficient number, since it is larger than the sum of its proper divisors (23215033).

61685319 is a wasteful number, since it uses less digits than its factorization.

61685319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663317.

The product of its digits is 38880, while the sum is 39.

The square root of 61685319 is about 7854.0001909855. Note that the first 3 decimals coincide. The cubic root of 61685319 is about 395.1184156000.

The spelling of 61685319 in words is "sixty-one million, six hundred eighty-five thousand, three hundred nineteen".