70987609 has 24 divisors (see below), whose sum is σ = 90251712. Its totient is φ = 54241920.

The previous prime is 70987603. The next prime is 70987627. The reversal of 70987609 is 90678907.

It is a de Polignac number, because none of the positive numbers 2^k-70987609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70987603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 410247 + ... + 410419.

It is an arithmetic number, because the mean of its divisors is an integer number (3760488).

Almost surely, 2^70987609 is an apocalyptic number.

70987609 is the 5329-th heptagonal number.

It is an amenable number.

70987609 is a deficient number, since it is larger than the sum of its proper divisors (19264103).

70987609 is a wasteful number, since it uses less digits than its factorization.

70987609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 70987609 is about 8425.4144705172. The cubic root of 70987609 is about 414.0576848682.

The spelling of 70987609 in words is "seventy million, nine hundred eighty-seven thousand, six hundred nine".