70500081 has 8 divisors (see below), whose sum is σ = 94102560. Its totient is φ = 46948832.

The previous prime is 70500077. The next prime is 70500097. The reversal of 70500081 is 18000507.

It is a happy number.

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 70500081 - 2² = 70500077 is a prime.

It is a super-2 number, since 2×70500081² = 9940522842013122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70500011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9471 + ... + 15188.

It is an arithmetic number, because the mean of its divisors is an integer number (11762820).

Almost surely, 2^70500081 is an apocalyptic number.

It is an amenable number.

70500081 is a deficient number, since it is larger than the sum of its proper divisors (23602479).

70500081 is a wasteful number, since it uses less digits than its factorization.

70500081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25615.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 70500081 is about 8396.4326353518. The cubic root of 70500081 is about 413.1076194946.

Adding to 70500081 its reverse (18000507), we get a palindrome (88500588).

The spelling of 70500081 in words is "seventy million, five hundred thousand, eighty-one".