61689435 has 8 divisors (see below), whose sum is σ = 98703120. Its totient is φ = 32901024.

The previous prime is 61689401. The next prime is 61689443. The reversal of 61689435 is 53498616.

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

It is not a de Polignac number, because 61689435 - 2⁹ = 61688923 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2056300 + ... + 2056329.

It is an arithmetic number, because the mean of its divisors is an integer number (12337890).

Almost surely, 2^61689435 is an apocalyptic number.

61689435 is a deficient number, since it is larger than the sum of its proper divisors (37013685).

61689435 is a wasteful number, since it uses less digits than its factorization.

61689435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4112637.

The product of its digits is 155520, while the sum is 42.

The square root of 61689435 is about 7854.2622186937. The cubic root of 61689435 is about 395.1272035972.

The spelling of 61689435 in words is "sixty-one million, six hundred eighty-nine thousand, four hundred thirty-five".