70945439 has 4 divisors (see below), whose sum is σ = 70969920. Its totient is φ = 70920960.

The previous prime is 70945423. The next prime is 70945451. The reversal of 70945439 is 93454907.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 70945439 - 2⁴ = 70945423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70945396 and 70945405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70945489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7202 + ... + 13919.

It is an arithmetic number, because the mean of its divisors is an integer number (17742480).

Almost surely, 2^70945439 is an apocalyptic number.

70945439 is a deficient number, since it is larger than the sum of its proper divisors (24481).

70945439 is a wasteful number, since it uses less digits than its factorization.

70945439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24480.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 70945439 is about 8422.9115512393. The cubic root of 70945439 is about 413.9756786727.

The spelling of 70945439 in words is "seventy million, nine hundred forty-five thousand, four hundred thirty-nine".