61614921 has 4 divisors (see below), whose sum is σ = 82153232. Its totient is φ = 41076612.

The previous prime is 61614913. The next prime is 61614983. The reversal of 61614921 is 12941616.

It is a happy number.

61614921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 61614921 - 2³ = 61614913 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61614901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10269151 + ... + 10269156.

It is an arithmetic number, because the mean of its divisors is an integer number (20538308).

Almost surely, 2^61614921 is an apocalyptic number.

It is an amenable number.

61614921 is a deficient number, since it is larger than the sum of its proper divisors (20538311).

61614921 is a wasteful number, since it uses less digits than its factorization.

61614921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20538310.

The product of its digits is 2592, while the sum is 30.

The square root of 61614921 is about 7849.5172463025. The cubic root of 61614921 is about 394.9680495441.

The spelling of 61614921 in words is "sixty-one million, six hundred fourteen thousand, nine hundred twenty-one".