70749947 has 4 divisors (see below), whose sum is σ = 71602440. Its totient is φ = 69897456.

The previous prime is 70749941. The next prime is 70749953. The reversal of 70749947 is 74994707.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74994707 = 4567 ⋅16421.

It is an interprime number because it is at equal distance from previous prime (70749941) and next prime (70749953).

It is a cyclic number.

It is not a de Polignac number, because 70749947 - 2²⁴ = 53972731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70749941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426122 + ... + 426287.

It is an arithmetic number, because the mean of its divisors is an integer number (17900610).

Almost surely, 2^70749947 is an apocalyptic number.

70749947 is a deficient number, since it is larger than the sum of its proper divisors (852493).

70749947 is an equidigital number, since it uses as much as digits as its factorization.

70749947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852492.

The product of its (nonzero) digits is 444528, while the sum is 47.

The square root of 70749947 is about 8411.2987701068. The cubic root of 70749947 is about 413.5950886378.

The spelling of 70749947 in words is "seventy million, seven hundred forty-nine thousand, nine hundred forty-seven".