70287681 has 8 divisors (see below), whose sum is σ = 93952224. Its totient is φ = 46740800.

The previous prime is 70287667. The next prime is 70287689. The reversal of 70287681 is 18678207.

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

It is a cyclic number.

It is not a de Polignac number, because 70287681 - 2⁵ = 70287649 is a prime.

It is a super-2 number, since 2×70287681² = 9880716200715522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (70287689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28011 + ... + 30416.

It is an arithmetic number, because the mean of its divisors is an integer number (11744028).

Almost surely, 2^70287681 is an apocalyptic number.

It is an amenable number.

70287681 is a deficient number, since it is larger than the sum of its proper divisors (23664543).

70287681 is a wasteful number, since it uses less digits than its factorization.

70287681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58831.

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 70287681 is about 8383.7748657750. The cubic root of 70287681 is about 412.6923371183.

The spelling of 70287681 in words is "seventy million, two hundred eighty-seven thousand, six hundred eighty-one".