61919849 has 4 divisors (see below), whose sum is σ = 62213520. Its totient is φ = 61626180.

The previous prime is 61919827. The next prime is 61919857. The reversal of 61919849 is 94891916.

61919849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-61919849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61919449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146519 + ... + 146940.

It is an arithmetic number, because the mean of its divisors is an integer number (15553380).

Almost surely, 2^61919849 is an apocalyptic number.

It is an amenable number.

61919849 is a deficient number, since it is larger than the sum of its proper divisors (293671).

61919849 is a wasteful number, since it uses less digits than its factorization.

61919849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293670.

The product of its digits is 139968, while the sum is 47.

The square root of 61919849 is about 7868.9166344548. The cubic root of 61919849 is about 395.6185342106.

The spelling of 61919849 in words is "sixty-one million, nine hundred nineteen thousand, eight hundred forty-nine".