70519613 has 4 divisors (see below), whose sum is σ = 72159648. Its totient is φ = 68879580.

The previous prime is 70519601. The next prime is 70519649. The reversal of 70519613 is 31691507.

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.

It is a cyclic number.

It is not a de Polignac number, because 70519613 - 2⁴ = 70519597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70519613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70549613) 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, 819953 + ... + 820038.

It is an arithmetic number, because the mean of its divisors is an integer number (18039912).

Almost surely, 2^70519613 is an apocalyptic number.

It is an amenable number.

70519613 is a deficient number, since it is larger than the sum of its proper divisors (1640035).

70519613 is a wasteful number, since it uses less digits than its factorization.

70519613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640034.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 70519613 is about 8397.5956678087. The cubic root of 70519613 is about 413.1457663679.

The spelling of 70519613 in words is "seventy million, five hundred nineteen thousand, six hundred thirteen".