70622645 has 4 divisors (see below), whose sum is σ = 84747180. Its totient is φ = 56498112.

The previous prime is 70622633. The next prime is 70622647. The reversal of 70622645 is 54622607.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54622607 = 13 ⋅4201739.

It can be written as a sum of positive squares in 2 ways, for example, as 34128964 + 36493681 = 5842^2 + 6041^2 .

It is a cyclic number.

It is not a de Polignac number, because 70622645 - 2⁸ = 70622389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70622647) 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, 7062260 + ... + 7062269.

It is an arithmetic number, because the mean of its divisors is an integer number (21186795).

Almost surely, 2^70622645 is an apocalyptic number.

It is an amenable number.

70622645 is a deficient number, since it is larger than the sum of its proper divisors (14124535).

70622645 is a wasteful number, since it uses less digits than its factorization.

70622645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14124534.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 70622645 is about 8403.7280417681. The cubic root of 70622645 is about 413.3468760015.

The spelling of 70622645 in words is "seventy million, six hundred twenty-two thousand, six hundred forty-five".