70831393 has 4 divisors (see below), whose sum is σ = 71087380. Its totient is φ = 70575408.

The previous prime is 70831391. The next prime is 70831399. The reversal of 70831393 is 39313807.

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 27112849 + 43718544 = 5207^2 + 6612^2 .

It is a cyclic number.

It is not a de Polignac number, because 70831393 - 2¹ = 70831391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70831391) 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, 127578 + ... + 128131.

It is an arithmetic number, because the mean of its divisors is an integer number (17771845).

Almost surely, 2^70831393 is an apocalyptic number.

It is an amenable number.

70831393 is a deficient number, since it is larger than the sum of its proper divisors (255987).

70831393 is a wasteful number, since it uses less digits than its factorization.

70831393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255986.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 70831393 is about 8416.1388415354. The cubic root of 70831393 is about 413.7537353892.

The spelling of 70831393 in words is "seventy million, eight hundred thirty-one thousand, three hundred ninety-three".