61894219 has 4 divisors (see below), whose sum is σ = 64585296. Its totient is φ = 59203144.

The previous prime is 61894211. The next prime is 61894237. The reversal of 61894219 is 91249816.

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 61894219 - 2³ = 61894211 is a prime.

It is a super-2 number, since 2×61894219² = 7661788691239922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61894211) 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, 1345504 + ... + 1345549.

It is an arithmetic number, because the mean of its divisors is an integer number (16146324).

Almost surely, 2^61894219 is an apocalyptic number.

61894219 is a deficient number, since it is larger than the sum of its proper divisors (2691077).

61894219 is a wasteful number, since it uses less digits than its factorization.

61894219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2691076.

The product of its digits is 31104, while the sum is 40.

The square root of 61894219 is about 7867.2879062610. The cubic root of 61894219 is about 395.5639415798.

The spelling of 61894219 in words is "sixty-one million, eight hundred ninety-four thousand, two hundred nineteen".