70436721 has 8 divisors (see below), whose sum is σ = 94591840. Its totient is φ = 46619712.

The previous prime is 70436711. The next prime is 70436731. The reversal of 70436721 is 12763407.

It is an interprime number because it is at equal distance from previous prime (70436711) and next prime (70436731).

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

It is not a de Polignac number, because 70436721 - 2⁵ = 70436689 is a prime.

It is a super-2 number, since 2×70436721² = 9922663330463682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70436711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84040 + ... + 84873.

It is an arithmetic number, because the mean of its divisors is an integer number (11823980).

Almost surely, 2^70436721 is an apocalyptic number.

It is an amenable number.

70436721 is a deficient number, since it is larger than the sum of its proper divisors (24155119).

70436721 is a wasteful number, since it uses less digits than its factorization.

70436721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169055.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 70436721 is about 8392.6587563179. The cubic root of 70436721 is about 412.9838260487.

The spelling of 70436721 in words is "seventy million, four hundred thirty-six thousand, seven hundred twenty-one".