61435623 has 4 divisors (see below), whose sum is σ = 81914168. Its totient is φ = 40957080.

The previous prime is 61435597. The next prime is 61435643. The reversal of 61435623 is 32653416.

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

It is not a de Polignac number, because 61435623 - 2⁹ = 61435111 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 (61435643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10239268 + ... + 10239273.

It is an arithmetic number, because the mean of its divisors is an integer number (20478542).

Almost surely, 2^61435623 is an apocalyptic number.

61435623 is a deficient number, since it is larger than the sum of its proper divisors (20478545).

61435623 is a wasteful number, since it uses less digits than its factorization.

61435623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20478544.

The product of its digits is 12960, while the sum is 30.

The square root of 61435623 is about 7838.0879683760. The cubic root of 61435623 is about 394.5845613490.

The spelling of 61435623 in words is "sixty-one million, four hundred thirty-five thousand, six hundred twenty-three".