61423965 has 24 divisors (see below), whose sum is σ = 106748928. Its totient is φ = 32673120.

The previous prime is 61423963. The next prime is 61423969. The reversal of 61423965 is 56932416.

It is a happy number.

61423965 is a `hidden beast` number, since 614 + 2 + 39 + 6 + 5 = 666.

61423965 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 61423965 - 2¹ = 61423963 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61423963) 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, 17812 + ... + 20978.

It is an arithmetic number, because the mean of its divisors is an integer number (4447872).

Almost surely, 2^61423965 is an apocalyptic number.

It is an amenable number.

61423965 is a deficient number, since it is larger than the sum of its proper divisors (45324963).

61423965 is a wasteful number, since it uses less digits than its factorization.

61423965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3609 (or 3606 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 61423965 is about 7837.3442568258. The cubic root of 61423965 is about 394.5596010323.

The spelling of 61423965 in words is "sixty-one million, four hundred twenty-three thousand, nine hundred sixty-five".