70757213 has 4 divisors (see below), whose sum is σ = 74919420. Its totient is φ = 66595008.

The previous prime is 70757191. The next prime is 70757227. The reversal of 70757213 is 31275707.

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 47927929 + 22829284 = 6923^2 + 4778^2 .

It is a cyclic number.

It is not a de Polignac number, because 70757213 - 2⁶ = 70757149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 70757213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70757243) 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, 2081078 + ... + 2081111.

It is an arithmetic number, because the mean of its divisors is an integer number (18729855).

Almost surely, 2^70757213 is an apocalyptic number.

It is an amenable number.

70757213 is a deficient number, since it is larger than the sum of its proper divisors (4162207).

70757213 is a wasteful number, since it uses less digits than its factorization.

70757213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4162206.

The product of its (nonzero) digits is 10290, while the sum is 32.

The square root of 70757213 is about 8411.7306780472. The cubic root of 70757213 is about 413.6092468536.

The spelling of 70757213 in words is "seventy million, seven hundred fifty-seven thousand, two hundred thirteen".