61859493 has 6 divisors (see below), whose sum is σ = 89352614. Its totient is φ = 41239656.

The previous prime is 61859491. The next prime is 61859507. The reversal of 61859493 is 39495816.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 52751169 + 9108324 = 7263^2 + 3018^2 .

It is not a de Polignac number, because 61859493 - 2¹ = 61859491 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61859491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3436630 + ... + 3436647.

Almost surely, 2^61859493 is an apocalyptic number.

It is an amenable number.

61859493 is a deficient number, since it is larger than the sum of its proper divisors (27493121).

61859493 is a wasteful number, since it uses less digits than its factorization.

61859493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6873283 (or 6873280 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 61859493 is about 7865.0806098857. The cubic root of 61859493 is about 395.4899501613.

The spelling of 61859493 in words is "sixty-one million, eight hundred fifty-nine thousand, four hundred ninety-three".