70139659 has 4 divisors (see below), whose sum is σ = 73831240. Its totient is φ = 66448080.

The previous prime is 70139611. The next prime is 70139689. The reversal of 70139659 is 95693107.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 70139659 - 2¹¹ = 70137611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70139689) 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, 1845762 + ... + 1845799.

It is an arithmetic number, because the mean of its divisors is an integer number (18457810).

Almost surely, 2^70139659 is an apocalyptic number.

70139659 is a deficient number, since it is larger than the sum of its proper divisors (3691581).

70139659 is a wasteful number, since it uses less digits than its factorization.

70139659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3691580.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 70139659 is about 8374.9423281596. The cubic root of 70139659 is about 412.4024310407.

The spelling of 70139659 in words is "seventy million, one hundred thirty-nine thousand, six hundred fifty-nine".