70081573 has 4 divisors (see below), whose sum is σ = 70103340. Its totient is φ = 70059808.

The previous prime is 70081553. The next prime is 70081591. The reversal of 70081573 is 37518007.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37518007 = 131 ⋅286397.

It can be written as a sum of positive squares in 2 ways, for example, as 34833604 + 35247969 = 5902^2 + 5937^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70081573 is a prime.

It is a super-2 number, since 2×70081573² = 9822853748308658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70081513) 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, 4990 + ... + 12847.

It is an arithmetic number, because the mean of its divisors is an integer number (17525835).

Almost surely, 2^70081573 is an apocalyptic number.

It is an amenable number.

70081573 is a deficient number, since it is larger than the sum of its proper divisors (21767).

70081573 is a wasteful number, since it uses less digits than its factorization.

70081573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21766.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 70081573 is about 8371.4737651145. The cubic root of 70081573 is about 412.2885562196.

The spelling of 70081573 in words is "seventy million, eighty-one thousand, five hundred seventy-three".