70429581 has 10 divisors (see below), whose sum is σ = 105209742. Its totient is φ = 46953000.

The previous prime is 70429577. The next prime is 70429607. The reversal of 70429581 is 18592407.

70429581 is a `hidden beast` number, since 70 + 4 + 2 + 9 + 581 = 666.

It can be written as a sum of positive squares in only one way, i.e., 61873956 + 8555625 = 7866^2 + 2925^2 .

It is not a de Polignac number, because 70429581 - 2² = 70429577 is a prime.

It is a super-2 number, since 2×70429581² = 9920651759671122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70429481) 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 9 ways as a sum of consecutive naturals, for example, 434670 + ... + 434831.

Almost surely, 2^70429581 is an apocalyptic number.

It is an amenable number.

70429581 is a deficient number, since it is larger than the sum of its proper divisors (34780161).

70429581 is an equidigital number, since it uses as much as digits as its factorization.

70429581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869513 (or 869504 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 70429581 is about 8392.2333737808. The cubic root of 70429581 is about 412.9698711867.

The spelling of 70429581 in words is "seventy million, four hundred twenty-nine thousand, five hundred eighty-one".