61367691 has 24 divisors (see below), whose sum is σ = 102790912. Its totient is φ = 31878000.

The previous prime is 61367653. The next prime is 61367711. The reversal of 61367691 is 19676316.

61367691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61367691 - 2¹³ = 61359499 is a prime.

It is a super-3 number, since 3×61367691³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61367641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9535 + ... + 14616.

Almost surely, 2^61367691 is an apocalyptic number.

61367691 is a deficient number, since it is larger than the sum of its proper divisors (41423221).

61367691 is a wasteful number, since it uses less digits than its factorization.

61367691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24183 (or 24172 counting only the distinct ones).

The product of its digits is 40824, while the sum is 39.

The square root of 61367691 is about 7833.7533149825. The cubic root of 61367691 is about 394.4390713603.

The spelling of 61367691 in words is "sixty-one million, three hundred sixty-seven thousand, six hundred ninety-one".