70561869 has 16 divisors (see below), whose sum is σ = 108820992. Its totient is φ = 39834288.

The previous prime is 70561853. The next prime is 70561889. The reversal of 70561869 is 96816507.

It is not a de Polignac number, because 70561869 - 2⁴ = 70561853 is a prime.

It is a super-2 number, since 2×70561869² = 9957954713546322, which contains 22 as substring.

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 70561869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70561819) 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 15 ways as a sum of consecutive naturals, for example, 18499 + ... + 21984.

It is an arithmetic number, because the mean of its divisors is an integer number (6801312).

Almost surely, 2^70561869 is an apocalyptic number.

It is an amenable number.

70561869 is a deficient number, since it is larger than the sum of its proper divisors (38259123).

70561869 is a wasteful number, since it uses less digits than its factorization.

70561869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40576.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 70561869 is about 8400.1112492633. Note that the first 3 decimals coincide. The cubic root of 70561869 is about 413.2282701374.

The spelling of 70561869 in words is "seventy million, five hundred sixty-one thousand, eight hundred sixty-nine".