70894081 has 4 divisors (see below), whose sum is σ = 70917700. Its totient is φ = 70870464.

The previous prime is 70894069. The next prime is 70894091. The reversal of 70894081 is 18049807.

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 7929856 + 62964225 = 2816^2 + 7935^2 .

It is a cyclic number.

It is not a de Polignac number, because 70894081 - 2⁹ = 70893569 is a prime.

It is a super-2 number, since 2×70894081² = 10051941441669122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70894081.

It is not an unprimeable number, because it can be changed into a prime (70894091) 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, 6516 + ... + 13573.

It is an arithmetic number, because the mean of its divisors is an integer number (17729425).

Almost surely, 2^70894081 is an apocalyptic number.

It is an amenable number.

70894081 is a deficient number, since it is larger than the sum of its proper divisors (23619).

70894081 is a wasteful number, since it uses less digits than its factorization.

70894081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23618.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 70894081 is about 8419.8622910354. The cubic root of 70894081 is about 413.8757610665.

The spelling of 70894081 in words is "seventy million, eight hundred ninety-four thousand, eighty-one".