61940687 has 4 divisors (see below), whose sum is σ = 61974696. Its totient is φ = 61906680.

The previous prime is 61940677. The next prime is 61940731. The reversal of 61940687 is 78604916.

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 61940687 - 2¹⁸ = 61678543 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 (61940617) 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, 14108 + ... + 17969.

It is an arithmetic number, because the mean of its divisors is an integer number (15493674).

Almost surely, 2^61940687 is an apocalyptic number.

61940687 is a deficient number, since it is larger than the sum of its proper divisors (34009).

61940687 is a wasteful number, since it uses less digits than its factorization.

61940687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34008.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 61940687 is about 7870.2405935270. The cubic root of 61940687 is about 395.6629086428.

The spelling of 61940687 in words is "sixty-one million, nine hundred forty thousand, six hundred eighty-seven".