61422643 has 4 divisors (see below), whose sum is σ = 61447000. Its totient is φ = 61398288.

The previous prime is 61422623. The next prime is 61422659. The reversal of 61422643 is 34622416.

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 61422643 - 2⁹ = 61422131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61422623) 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, 7893 + ... + 13606.

It is an arithmetic number, because the mean of its divisors is an integer number (15361750).

Almost surely, 2^61422643 is an apocalyptic number.

61422643 is a deficient number, since it is larger than the sum of its proper divisors (24357).

61422643 is a wasteful number, since it uses less digits than its factorization.

61422643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24356.

The product of its digits is 6912, while the sum is 28.

The square root of 61422643 is about 7837.2599165780. The cubic root of 61422643 is about 394.5567703698.

The spelling of 61422643 in words is "sixty-one million, four hundred twenty-two thousand, six hundred forty-three".