70689613 has 4 divisors (see below), whose sum is σ = 70886880. Its totient is φ = 70492348.

The previous prime is 70689607. The next prime is 70689631. The reversal of 70689613 is 31698607.

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: 31698607 = 419 ⋅75653.

It is a cyclic number.

It is not a de Polignac number, because 70689613 - 2¹³ = 70681421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70689643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98095 + ... + 98812.

It is an arithmetic number, because the mean of its divisors is an integer number (17721720).

Almost surely, 2^70689613 is an apocalyptic number.

It is an amenable number.

70689613 is a deficient number, since it is larger than the sum of its proper divisors (197267).

70689613 is a wasteful number, since it uses less digits than its factorization.

70689613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197266.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 70689613 is about 8407.7115197894. The cubic root of 70689613 is about 413.4774869346.

The spelling of 70689613 in words is "seventy million, six hundred eighty-nine thousand, six hundred thirteen".