70129669 has 4 divisors (see below), whose sum is σ = 70164396. Its totient is φ = 70094944.

The previous prime is 70129667. The next prime is 70129673. The reversal of 70129669 is 96692107.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96692107 = 17 ⋅5687771.

It can be written as a sum of positive squares in 2 ways, for example, as 2265025 + 67864644 = 1505^2 + 8238^2 .

It is a cyclic number.

It is not a de Polignac number, because 70129669 - 2¹ = 70129667 is a prime.

It is a super-2 number, since 2×70129669² = 9836340948099122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70129667) 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, 14134 + ... + 18439.

It is an arithmetic number, because the mean of its divisors is an integer number (17541099).

Almost surely, 2^70129669 is an apocalyptic number.

It is an amenable number.

70129669 is a deficient number, since it is larger than the sum of its proper divisors (34727).

70129669 is a wasteful number, since it uses less digits than its factorization.

70129669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34726.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 70129669 is about 8374.3458849035. The cubic root of 70129669 is about 412.3828506019.

The spelling of 70129669 in words is "seventy million, one hundred twenty-nine thousand, six hundred sixty-nine".