70821117 has 12 divisors (see below), whose sum is σ = 106745184. Its totient is φ = 45161160.

The previous prime is 70821097. The next prime is 70821119. The reversal of 70821117 is 71112807.

It is not a de Polignac number, because 70821117 - 2⁷ = 70820989 is a prime.

It is a super-2 number, since 2×70821117² = 10031261226255378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70821119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170859 + ... + 171272.

It is an arithmetic number, because the mean of its divisors is an integer number (8895432).

Almost surely, 2^70821117 is an apocalyptic number.

It is an amenable number.

70821117 is a deficient number, since it is larger than the sum of its proper divisors (35924067).

70821117 is a wasteful number, since it uses less digits than its factorization.

70821117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342160 (or 342157 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 27.

The square root of 70821117 is about 8415.5283256608. The cubic root of 70821117 is about 413.7337257163.

The spelling of 70821117 in words is "seventy million, eight hundred twenty-one thousand, one hundred seventeen".