70971263 has 4 divisors (see below), whose sum is σ = 77423208. Its totient is φ = 64519320.

The previous prime is 70971253. The next prime is 70971319. The reversal of 70971263 is 36217907.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36217907 = 11 ⋅3292537.

It is a cyclic number.

It is not a de Polignac number, because 70971263 - 2²² = 66776959 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 (70971203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3225956 + ... + 3225977.

It is an arithmetic number, because the mean of its divisors is an integer number (19355802).

Almost surely, 2^70971263 is an apocalyptic number.

70971263 is a deficient number, since it is larger than the sum of its proper divisors (6451945).

70971263 is a wasteful number, since it uses less digits than its factorization.

70971263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6451944.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 70971263 is about 8424.4443733697. Note that the first 3 decimals coincide. The cubic root of 70971263 is about 414.0259013566.

The spelling of 70971263 in words is "seventy million, nine hundred seventy-one thousand, two hundred sixty-three".