70813237 has 4 divisors (see below), whose sum is σ = 77250816. Its totient is φ = 64375660.

The previous prime is 70813213. The next prime is 70813241. The reversal of 70813237 is 73231807.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73231807 = 11 ⋅6657437.

It is a cyclic number.

It is not a de Polignac number, because 70813237 - 2¹¹ = 70811189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70813199 and 70813208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70813277) 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, 3218773 + ... + 3218794.

It is an arithmetic number, because the mean of its divisors is an integer number (19312704).

Almost surely, 2^70813237 is an apocalyptic number.

It is an amenable number.

70813237 is a deficient number, since it is larger than the sum of its proper divisors (6437579).

70813237 is a wasteful number, since it uses less digits than its factorization.

70813237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6437578.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 70813237 is about 8415.0601305041. The cubic root of 70813237 is about 413.7183802806.

The spelling of 70813237 in words is "seventy million, eight hundred thirteen thousand, two hundred thirty-seven".