61684477 has 4 divisors (see below), whose sum is σ = 61701280. Its totient is φ = 61667676.

The previous prime is 61684429. The next prime is 61684487. The reversal of 61684477 is 77448616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61684477 - 2⁷ = 61684349 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 (61684417) 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, 273 + ... + 11110.

It is an arithmetic number, because the mean of its divisors is an integer number (15425320).

Almost surely, 2^61684477 is an apocalyptic number.

It is an amenable number.

61684477 is a deficient number, since it is larger than the sum of its proper divisors (16803).

61684477 is a wasteful number, since it uses less digits than its factorization.

61684477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16802.

The product of its digits is 225792, while the sum is 43.

The square root of 61684477 is about 7853.9465875444. The cubic root of 61684477 is about 395.1166178129.

The spelling of 61684477 in words is "sixty-one million, six hundred eighty-four thousand, four hundred seventy-seven".