70809399 has 12 divisors (see below), whose sum is σ = 102722256. Its totient is φ = 47002272.

The previous prime is 70809397. The next prime is 70809407. The reversal of 70809399 is 99390807.

It is a happy number.

It is not a de Polignac number, because 70809399 - 2¹ = 70809397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70809391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14787 + ... + 18980.

It is an arithmetic number, because the mean of its divisors is an integer number (8560188).

Almost surely, 2^70809399 is an apocalyptic number.

70809399 is a deficient number, since it is larger than the sum of its proper divisors (31912857).

70809399 is a wasteful number, since it uses less digits than its factorization.

70809399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34006 (or 34003 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 70809399 is about 8414.8320838862. The cubic root of 70809399 is about 413.7109057843.

The spelling of 70809399 in words is "seventy million, eight hundred nine thousand, three hundred ninety-nine".