70603081 has 4 divisors (see below), whose sum is σ = 73037700. Its totient is φ = 68168464.

The previous prime is 70603063. The next prime is 70603109. The reversal of 70603081 is 18030607.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18030607 = 7 ⋅2575801.

It can be written as a sum of positive squares in 2 ways, for example, as 58064400 + 12538681 = 7620^2 + 3541^2 .

It is a cyclic number.

It is not a de Polignac number, because 70603081 - 2⁷ = 70602953 is a prime.

It is a super-2 number, since 2×70603081² = 9969590093385122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70603021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1217266 + ... + 1217323.

It is an arithmetic number, because the mean of its divisors is an integer number (18259425).

Almost surely, 2^70603081 is an apocalyptic number.

It is an amenable number.

70603081 is a deficient number, since it is larger than the sum of its proper divisors (2434619).

70603081 is a wasteful number, since it uses less digits than its factorization.

70603081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434618.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 70603081 is about 8402.5639539369. The cubic root of 70603081 is about 413.3087038018.

Adding to 70603081 its reverse (18030607), we get a palindrome (88633688).

The spelling of 70603081 in words is "seventy million, six hundred three thousand, eighty-one".