61911847 has 4 divisors (see below), whose sum is σ = 62140576. Its totient is φ = 61683120.

The previous prime is 61911833. The next prime is 61911869. The reversal of 61911847 is 74811916.

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 61911847 - 2¹⁹ = 61387559 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 (61911877) 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, 113958 + ... + 114499.

It is an arithmetic number, because the mean of its divisors is an integer number (15535144).

Almost surely, 2^61911847 is an apocalyptic number.

61911847 is a deficient number, since it is larger than the sum of its proper divisors (228729).

61911847 is a wasteful number, since it uses less digits than its factorization.

61911847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228728.

The product of its digits is 12096, while the sum is 37.

The square root of 61911847 is about 7868.4081617567. The cubic root of 61911847 is about 395.6014913402.

The spelling of 61911847 in words is "sixty-one million, nine hundred eleven thousand, eight hundred forty-seven".