61919 has 8 divisors (see below), whose sum is σ = 72912. Its totient is φ = 51840.

The previous prime is 61909. The next prime is 61927. The reversal of 61919 is 91916.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61919 is a prime.

It is a super-2 number, since 2×61919² = 7667925122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74 + ... + 359.

It is an arithmetic number, because the mean of its divisors is an integer number (9114).

2⁶¹⁹¹⁹ is an apocalyptic number.

61919 is a deficient number, since it is larger than the sum of its proper divisors (10993).

61919 is a wasteful number, since it uses less digits than its factorization.

61919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457.

The product of its digits is 486, while the sum is 26.

The square root of 61919 is about 248.8352868867. The cubic root of 61919 is about 39.5616726058.

The spelling of 61919 in words is "sixty-one thousand, nine hundred nineteen".