61819493 has 4 divisors (see below), whose sum is σ = 62742240. Its totient is φ = 60896748.

The previous prime is 61819481. The next prime is 61819507. The reversal of 61819493 is 39491816.

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 a cyclic number.

It is not a de Polignac number, because 61819493 - 2⁴ = 61819477 is a prime.

It is a super-3 number, since 3×61819493³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61819493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61819403) 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, 461273 + ... + 461406.

It is an arithmetic number, because the mean of its divisors is an integer number (15685560).

Almost surely, 2^61819493 is an apocalyptic number.

It is an amenable number.

61819493 is a deficient number, since it is larger than the sum of its proper divisors (922747).

61819493 is an equidigital number, since it uses as much as digits as its factorization.

61819493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922746.

The product of its digits is 46656, while the sum is 41.

The square root of 61819493 is about 7862.5373131070. The cubic root of 61819493 is about 395.4046869934.

The spelling of 61819493 in words is "sixty-one million, eight hundred nineteen thousand, four hundred ninety-three".