61687323 has 6 divisors (see below), whose sum is σ = 89103924. Its totient is φ = 41124876.

The previous prime is 61687313. The next prime is 61687331. The reversal of 61687323 is 32378616.

It is a happy number.

61687323 is a `hidden beast` number, since 616 + 8 + 7 + 32 + 3 = 666.

It is not a de Polignac number, because 61687323 - 2⁵ = 61687291 is a prime.

It is a super-3 number, since 3×61687323³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (61687313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3427065 + ... + 3427082.

It is an arithmetic number, because the mean of its divisors is an integer number (14850654).

Almost surely, 2^61687323 is an apocalyptic number.

61687323 is a deficient number, since it is larger than the sum of its proper divisors (27416601).

61687323 is a wasteful number, since it uses less digits than its factorization.

61687323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6854153 (or 6854150 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 61687323 is about 7854.1277682503. The cubic root of 61687323 is about 395.1226943530.

The spelling of 61687323 in words is "sixty-one million, six hundred eighty-seven thousand, three hundred twenty-three".