69728671 has 4 divisors (see below), whose sum is σ = 71350312. Its totient is φ = 68107032.

The previous prime is 69728669. The next prime is 69728677. The reversal of 69728671 is 17682796.

It is a happy number.

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 69728671 - 2¹ = 69728669 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 (69728677) 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, 810756 + ... + 810841.

It is an arithmetic number, because the mean of its divisors is an integer number (17837578).

Almost surely, 2^69728671 is an apocalyptic number.

69728671 is a deficient number, since it is larger than the sum of its proper divisors (1621641).

69728671 is a wasteful number, since it uses less digits than its factorization.

69728671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621640.

The product of its digits is 254016, while the sum is 46.

The square root of 69728671 is about 8350.3695127821. The cubic root of 69728671 is about 411.5953527751.

The spelling of 69728671 in words is "sixty-nine million, seven hundred twenty-eight thousand, six hundred seventy-one".