70689869 has 4 divisors (see below), whose sum is σ = 72600444. Its totient is φ = 68779296.

The previous prime is 70689821. The next prime is 70689881. The reversal of 70689869 is 96898607.

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 66015625 + 4674244 = 8125^2 + 2162^2 .

It is a cyclic number.

It is not a de Polignac number, because 70689869 - 2¹² = 70685773 is a prime.

It is a super-2 number, since 2×70689869² = 9994115158474322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70689869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70689809) 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, 955232 + ... + 955305.

It is an arithmetic number, because the mean of its divisors is an integer number (18150111).

Almost surely, 2^70689869 is an apocalyptic number.

It is an amenable number.

70689869 is a deficient number, since it is larger than the sum of its proper divisors (1910575).

70689869 is a wasteful number, since it uses less digits than its factorization.

70689869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1910574.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 70689869 is about 8407.7267438946. The cubic root of 70689869 is about 413.4779860655.

The spelling of 70689869 in words is "seventy million, six hundred eighty-nine thousand, eight hundred sixty-nine".