70716991 has 8 divisors (see below), whose sum is σ = 75179664. Its totient is φ = 66288000.

The previous prime is 70716979. The next prime is 70717001. The reversal of 70716991 is 19961707.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 70716991 - 2⁹ = 70716479 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 (70716901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4020 + ... + 12553.

It is an arithmetic number, because the mean of its divisors is an integer number (9397458).

Almost surely, 2^70716991 is an apocalyptic number.

70716991 is a deficient number, since it is larger than the sum of its proper divisors (4462673).

70716991 is a wasteful number, since it uses less digits than its factorization.

70716991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16841.

The product of its (nonzero) digits is 23814, while the sum is 40.

The square root of 70716991 is about 8409.3395103302. The cubic root of 70716991 is about 413.5308598185.

The spelling of 70716991 in words is "seventy million, seven hundred sixteen thousand, nine hundred ninety-one".