61673687 has 4 divisors (see below), whose sum is σ = 61845840. Its totient is φ = 61501536.

The previous prime is 61673683. The next prime is 61673693. The reversal of 61673687 is 78637616.

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 61673687 - 2² = 61673683 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 (61673681) 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, 85538 + ... + 86255.

It is an arithmetic number, because the mean of its divisors is an integer number (15461460).

Almost surely, 2^61673687 is an apocalyptic number.

61673687 is a deficient number, since it is larger than the sum of its proper divisors (172153).

61673687 is a wasteful number, since it uses less digits than its factorization.

61673687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172152.

The product of its digits is 254016, while the sum is 44.

The square root of 61673687 is about 7853.2596417029. The cubic root of 61673687 is about 395.0935782135.

The spelling of 61673687 in words is "sixty-one million, six hundred seventy-three thousand, six hundred eighty-seven".