61812671 has 4 divisors (see below), whose sum is σ = 62683344. Its totient is φ = 60942000.

The previous prime is 61812623. The next prime is 61812679. The reversal of 61812671 is 17621816.

It is a happy number.

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 61812671 - 2¹⁸ = 61550527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61812679) 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, 435230 + ... + 435371.

It is an arithmetic number, because the mean of its divisors is an integer number (15670836).

Almost surely, 2^61812671 is an apocalyptic number.

61812671 is a deficient number, since it is larger than the sum of its proper divisors (870673).

61812671 is an equidigital number, since it uses as much as digits as its factorization.

61812671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870672.

The product of its digits is 4032, while the sum is 32.

The square root of 61812671 is about 7862.1034717180. The cubic root of 61812671 is about 395.3901416891.

The spelling of 61812671 in words is "sixty-one million, eight hundred twelve thousand, six hundred seventy-one".