70684991 has 16 divisors (see below), whose sum is σ = 80424960. Its totient is φ = 61659360.

The previous prime is 70684969. The next prime is 70685051. The reversal of 70684991 is 19948607.

It is a cyclic number.

It is not a de Polignac number, because 70684991 - 2⁶ = 70684927 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 (70684931) 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, 15290 + ... + 19368.

It is an arithmetic number, because the mean of its divisors is an integer number (5026560).

Almost surely, 2^70684991 is an apocalyptic number.

70684991 is a deficient number, since it is larger than the sum of its proper divisors (9739969).

70684991 is a wasteful number, since it uses less digits than its factorization.

70684991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4166.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 70684991 is about 8407.4366485868. The cubic root of 70684991 is about 413.4684750750.

The spelling of 70684991 in words is "seventy million, six hundred eighty-four thousand, nine hundred ninety-one".