70671993 has 16 divisors (see below), whose sum is σ = 108291456. Its totient is φ = 40158720.

The previous prime is 70671983. The next prime is 70672027. The reversal of 70671993 is 39917607.

It is not a de Polignac number, because 70671993 - 2⁹ = 70671481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70671943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5496 + ... + 13097.

It is an arithmetic number, because the mean of its divisors is an integer number (6768216).

Almost surely, 2^70671993 is an apocalyptic number.

It is an amenable number.

70671993 is a deficient number, since it is larger than the sum of its proper divisors (37619463).

70671993 is a wasteful number, since it uses less digits than its factorization.

70671993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18784.

The product of its (nonzero) digits is 71442, while the sum is 42.

The square root of 70671993 is about 8406.6636069252. The cubic root of 70671993 is about 413.4431297949.

The spelling of 70671993 in words is "seventy million, six hundred seventy-one thousand, nine hundred ninety-three".