70899929 has 4 divisors (see below), whose sum is σ = 71527476. Its totient is φ = 70272384.

The previous prime is 70899889. The next prime is 70899937. The reversal of 70899929 is 92999807.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92999807 = 61 ⋅1524587.

It can be written as a sum of positive squares in 2 ways, for example, as 39000025 + 31899904 = 6245^2 + 5648^2 .

It is a cyclic number.

It is not a de Polignac number, because 70899929 - 2¹² = 70895833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70899029) 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, 313604 + ... + 313829.

It is an arithmetic number, because the mean of its divisors is an integer number (17881869).

Almost surely, 2^70899929 is an apocalyptic number.

It is an amenable number.

70899929 is a deficient number, since it is larger than the sum of its proper divisors (627547).

70899929 is a wasteful number, since it uses less digits than its factorization.

70899929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627546.

The product of its (nonzero) digits is 734832, while the sum is 53.

The square root of 70899929 is about 8420.2095579623. The cubic root of 70899929 is about 413.8871408548.

The spelling of 70899929 in words is "seventy million, eight hundred ninety-nine thousand, nine hundred twenty-nine".