61947609 has 8 divisors (see below), whose sum is σ = 87455520. Its totient is φ = 38869056.

The previous prime is 61947607. The next prime is 61947623. The reversal of 61947609 is 90674916.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61947609 - 2¹ = 61947607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61947601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 607279 + ... + 607380.

It is an arithmetic number, because the mean of its divisors is an integer number (10931940).

Almost surely, 2^61947609 is an apocalyptic number.

It is an amenable number.

61947609 is a deficient number, since it is larger than the sum of its proper divisors (25507911).

61947609 is a wasteful number, since it uses less digits than its factorization.

61947609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214679.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 61947609 is about 7870.6803390812. The cubic root of 61947609 is about 395.6776468101.

The spelling of 61947609 in words is "sixty-one million, nine hundred forty-seven thousand, six hundred nine".