61619 has 4 divisors (see below), whose sum is σ = 63096. Its totient is φ = 60144.

The previous prime is 61613. The next prime is 61627. The reversal of 61619 is 91616.

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 61619 - 2⁴ = 61603 is a prime.

It is a super-2 number, since 2×61619² = 7593802322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 61594 and 61603.

It is not an unprimeable number, because it can be changed into a prime (61613) 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, 674 + ... + 759.

It is an arithmetic number, because the mean of its divisors is an integer number (15774).

2⁶¹⁶¹⁹ is an apocalyptic number.

61619 is a deficient number, since it is larger than the sum of its proper divisors (1477).

61619 is a wasteful number, since it uses less digits than its factorization.

61619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476.

The product of its digits is 324, while the sum is 23.

The square root of 61619 is about 248.2317465595. The cubic root of 61619 is about 39.4976765177.

The spelling of 61619 in words is "sixty-one thousand, six hundred nineteen".