61347887 has 4 divisors (see below), whose sum is σ = 63005976. Its totient is φ = 59689800.

The previous prime is 61347857. The next prime is 61347889. The reversal of 61347887 is 78874316.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61347887 - 2⁶ = 61347823 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 (61347889) 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, 828989 + ... + 829062.

It is an arithmetic number, because the mean of its divisors is an integer number (15751494).

Almost surely, 2^61347887 is an apocalyptic number.

61347887 is a deficient number, since it is larger than the sum of its proper divisors (1658089).

61347887 is a wasteful number, since it uses less digits than its factorization.

61347887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658088.

The product of its digits is 225792, while the sum is 44.

The square root of 61347887 is about 7832.4891956517. The cubic root of 61347887 is about 394.3966369149.

The spelling of 61347887 in words is "sixty-one million, three hundred forty-seven thousand, eight hundred eighty-seven".