61654687 has 4 divisors (see below), whose sum is σ = 61781776. Its totient is φ = 61527600.

The previous prime is 61654679. The next prime is 61654711. The reversal of 61654687 is 78645616.

It is a happy number.

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 61654687 - 2³ = 61654679 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 (61654657) 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, 62814 + ... + 63787.

It is an arithmetic number, because the mean of its divisors is an integer number (15445444).

Almost surely, 2^61654687 is an apocalyptic number.

61654687 is a deficient number, since it is larger than the sum of its proper divisors (127089).

61654687 is a wasteful number, since it uses less digits than its factorization.

61654687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127088.

The product of its digits is 241920, while the sum is 43.

The square root of 61654687 is about 7852.0498597500. The cubic root of 61654687 is about 395.0530014869.

The spelling of 61654687 in words is "sixty-one million, six hundred fifty-four thousand, six hundred eighty-seven".