61061687 has 4 divisors (see below), whose sum is σ = 64275480. Its totient is φ = 57847896.

The previous prime is 61061683. The next prime is 61061699. The reversal of 61061687 is 78616016.

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 61061687 - 2² = 61061683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61061683) 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, 1606868 + ... + 1606905.

It is an arithmetic number, because the mean of its divisors is an integer number (16068870).

Almost surely, 2^61061687 is an apocalyptic number.

61061687 is a deficient number, since it is larger than the sum of its proper divisors (3213793).

61061687 is a wasteful number, since it uses less digits than its factorization.

61061687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3213792.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 61061687 is about 7814.1977835220. The cubic root of 61061687 is about 393.7823679783.

The spelling of 61061687 in words is "sixty-one million, sixty-one thousand, six hundred eighty-seven".