70724029 has 4 divisors (see below), whose sum is σ = 74884284. Its totient is φ = 66563776.

The previous prime is 70724009. The next prime is 70724041. The reversal of 70724029 is 92042707.

It is a happy number.

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 51451929 + 19272100 = 7173^2 + 4390^2 .

It is a cyclic number.

It is not a de Polignac number, because 70724029 - 2⁵ = 70723997 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70724009) 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, 2080102 + ... + 2080135.

It is an arithmetic number, because the mean of its divisors is an integer number (18721071).

Almost surely, 2^70724029 is an apocalyptic number.

It is an amenable number.

70724029 is a deficient number, since it is larger than the sum of its proper divisors (4160255).

70724029 is a wasteful number, since it uses less digits than its factorization.

70724029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4160254.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 70724029 is about 8409.7579632234. The cubic root of 70724029 is about 413.5445780381.

The spelling of 70724029 in words is "seventy million, seven hundred twenty-four thousand, twenty-nine".