70190081 has 4 divisors (see below), whose sum is σ = 75589332. Its totient is φ = 64790832.

The previous prime is 70190039. The next prime is 70190083. The reversal of 70190081 is 18009107.

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 22800625 + 47389456 = 4775^2 + 6884^2 .

It is a cyclic number.

It is not a de Polignac number, because 70190081 - 2¹⁰ = 70189057 is a prime.

It is a super-2 number, since 2×70190081² = 9853294941573122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 70190081.

It is not an unprimeable number, because it can be changed into a prime (70190083) 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, 2699606 + ... + 2699631.

It is an arithmetic number, because the mean of its divisors is an integer number (18897333).

Almost surely, 2^70190081 is an apocalyptic number.

It is an amenable number.

70190081 is a deficient number, since it is larger than the sum of its proper divisors (5399251).

70190081 is a wasteful number, since it uses less digits than its factorization.

70190081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5399250.

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 70190081 is about 8377.9520767309. The cubic root of 70190081 is about 412.5012299933.

Adding to 70190081 its reverse (18009107), we get a palindrome (88199188).

The spelling of 70190081 in words is "seventy million, one hundred ninety thousand, eighty-one".