70856899 has 4 divisors (see below), whose sum is σ = 70913664. Its totient is φ = 70800136.

The previous prime is 70856881. The next prime is 70856921. The reversal of 70856899 is 99865807.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99865807 = 173 ⋅577259.

It is a cyclic number.

It is not a de Polignac number, because 70856899 - 2⁷ = 70856771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70851899) 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 3 ways as a sum of consecutive naturals, for example, 26467 + ... + 29020.

It is an arithmetic number, because the mean of its divisors is an integer number (17728416).

Almost surely, 2^70856899 is an apocalyptic number.

70856899 is a deficient number, since it is larger than the sum of its proper divisors (56765).

70856899 is a wasteful number, since it uses less digits than its factorization.

70856899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56764.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The square root of 70856899 is about 8417.6540080951. The cubic root of 70856899 is about 413.8033929203.

The spelling of 70856899 in words is "seventy million, eight hundred fifty-six thousand, eight hundred ninety-nine".