70523311 has 4 divisors (see below), whose sum is σ = 72163432. Its totient is φ = 68883192.

The previous prime is 70523303. The next prime is 70523407. The reversal of 70523311 is 11332507.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 70523311 - 2³ = 70523303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70520311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 819996 + ... + 820081.

It is an arithmetic number, because the mean of its divisors is an integer number (18040858).

Almost surely, 2^70523311 is an apocalyptic number.

70523311 is a deficient number, since it is larger than the sum of its proper divisors (1640121).

70523311 is a wasteful number, since it uses less digits than its factorization.

70523311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640120.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 70523311 is about 8397.8158469926. The cubic root of 70523311 is about 413.1529879350.

Adding to 70523311 its reverse (11332507), we get a palindrome (81855818).

The spelling of 70523311 in words is "seventy million, five hundred twenty-three thousand, three hundred eleven".