70505137 has 4 divisors (see below), whose sum is σ = 74652516. Its totient is φ = 66357760.

The previous prime is 70505131. The next prime is 70505173. The reversal of 70505137 is 73150507.

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 54110736 + 16394401 = 7356^2 + 4049^2 .

It is a cyclic number.

It is not a de Polignac number, because 70505137 - 2⁷ = 70505009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70505131) 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, 2073664 + ... + 2073697.

It is an arithmetic number, because the mean of its divisors is an integer number (18663129).

Almost surely, 2^70505137 is an apocalyptic number.

It is an amenable number.

70505137 is a deficient number, since it is larger than the sum of its proper divisors (4147379).

70505137 is a wasteful number, since it uses less digits than its factorization.

70505137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4147378.

The product of its (nonzero) digits is 3675, while the sum is 28.

The square root of 70505137 is about 8396.7337101995. The cubic root of 70505137 is about 413.1174947655.

The spelling of 70505137 in words is "seventy million, five hundred five thousand, one hundred thirty-seven".