61654479 has 4 divisors (see below), whose sum is σ = 82205976. Its totient is φ = 41102984.

The previous prime is 61654409. The next prime is 61654501. The reversal of 61654479 is 97445616.

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 61654479 - 2¹³ = 61646287 is a prime.

It is a super-2 number, since 2×61654479² = 7602549561522882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61654479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61654409) 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, 10275744 + ... + 10275749.

It is an arithmetic number, because the mean of its divisors is an integer number (20551494).

Almost surely, 2^61654479 is an apocalyptic number.

61654479 is a deficient number, since it is larger than the sum of its proper divisors (20551497).

61654479 is a wasteful number, since it uses less digits than its factorization.

61654479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20551496.

The product of its digits is 181440, while the sum is 42.

The square root of 61654479 is about 7852.0366147898. The cubic root of 61654479 is about 395.0525572324.

The spelling of 61654479 in words is "sixty-one million, six hundred fifty-four thousand, four hundred seventy-nine".