72429685 has 4 divisors (see below), whose sum is σ = 86915628. Its totient is φ = 57943744.

The previous prime is 72429677. The next prime is 72429689. The reversal of 72429685 is 58692427.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51251281 + 21178404 = 7159^2 + 4602^2 .

It is a cyclic number.

It is not a de Polignac number, because 72429685 - 2³ = 72429677 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 (72429689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7242964 + ... + 7242973.

It is an arithmetic number, because the mean of its divisors is an integer number (21728907).

Almost surely, 2^72429685 is an apocalyptic number.

It is an amenable number.

72429685 is a deficient number, since it is larger than the sum of its proper divisors (14485943).

72429685 is a wasteful number, since it uses less digits than its factorization.

72429685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14485942.

The product of its digits is 241920, while the sum is 43.

The square root of 72429685 is about 8510.5631423543. The cubic root of 72429685 is about 416.8426985979.

The spelling of 72429685 in words is "seventy-two million, four hundred twenty-nine thousand, six hundred eighty-five".