61947457 has 24 divisors (see below), whose sum is σ = 74839680. Its totient is φ = 50806080.

The previous prime is 61947437. The next prime is 61947461. The reversal of 61947457 is 75474916.

61947457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61947457 - 2²³ = 53558849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61947437) 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 23 ways as a sum of consecutive naturals, for example, 87019 + ... + 87727.

It is an arithmetic number, because the mean of its divisors is an integer number (3118320).

Almost surely, 2^61947457 is an apocalyptic number.

It is an amenable number.

61947457 is a deficient number, since it is larger than the sum of its proper divisors (12892223).

61947457 is a wasteful number, since it uses less digits than its factorization.

61947457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793 (or 780 counting only the distinct ones).

The product of its digits is 211680, while the sum is 43.

The square root of 61947457 is about 7870.6706829850. The cubic root of 61947457 is about 395.6773231869.

The spelling of 61947457 in words is "sixty-one million, nine hundred forty-seven thousand, four hundred fifty-seven".