70011509 has 4 divisors (see below), whose sum is σ = 70546080. Its totient is φ = 69476940.

The previous prime is 70011499. The next prime is 70011541. The reversal of 70011509 is 90511007.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90511007 = 61 ⋅1483787.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70011509 is a prime.

It is a super-2 number, since 2×70011509² = 9803222784914162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70011589) 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, 267089 + ... + 267350.

It is an arithmetic number, because the mean of its divisors is an integer number (17636520).

Almost surely, 2^70011509 is an apocalyptic number.

It is an amenable number.

70011509 is a deficient number, since it is larger than the sum of its proper divisors (534571).

70011509 is a wasteful number, since it uses less digits than its factorization.

70011509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534570.

The product of its (nonzero) digits is 315, while the sum is 23.

The square root of 70011509 is about 8367.2880313755. The cubic root of 70011509 is about 412.1511153491.

The spelling of 70011509 in words is "seventy million, eleven thousand, five hundred nine".