61423609 has 8 divisors (see below), whose sum is σ = 66290112. Its totient is φ = 56577360.

The previous prime is 61423597. The next prime is 61423613. The reversal of 61423609 is 90632416.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61423609 - 2²¹ = 59326457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61423619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1572 + ... + 11194.

It is an arithmetic number, because the mean of its divisors is an integer number (8286264).

Almost surely, 2^61423609 is an apocalyptic number.

It is an amenable number.

61423609 is a deficient number, since it is larger than the sum of its proper divisors (4866503).

61423609 is a wasteful number, since it uses less digits than its factorization.

61423609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10127.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 61423609 is about 7837.3215450178. The cubic root of 61423609 is about 394.5588387701.

The spelling of 61423609 in words is "sixty-one million, four hundred twenty-three thousand, six hundred nine".