70685993 has 4 divisors (see below), whose sum is σ = 80784000. Its totient is φ = 60587988.

The previous prime is 70685981. The next prime is 70685999. The reversal of 70685993 is 39958607.

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 70685993 - 2⁶ = 70685929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70685999) 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, 5048993 + ... + 5049006.

It is an arithmetic number, because the mean of its divisors is an integer number (20196000).

Almost surely, 2^70685993 is an apocalyptic number.

It is an amenable number.

70685993 is a deficient number, since it is larger than the sum of its proper divisors (10098007).

70685993 is a wasteful number, since it uses less digits than its factorization.

70685993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10098006.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 70685993 is about 8407.4962384767. The cubic root of 70685993 is about 413.4704287828.

The spelling of 70685993 in words is "seventy million, six hundred eighty-five thousand, nine hundred ninety-three".