70445839 has 4 divisors (see below), whose sum is σ = 70510024. Its totient is φ = 70381656.

The previous prime is 70445833. The next prime is 70445861. The reversal of 70445839 is 93854407.

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 70445839 - 2¹⁵ = 70413071 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 (70445833) 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, 30417 + ... + 32650.

It is an arithmetic number, because the mean of its divisors is an integer number (17627506).

Almost surely, 2^70445839 is an apocalyptic number.

70445839 is a deficient number, since it is larger than the sum of its proper divisors (64185).

70445839 is a wasteful number, since it uses less digits than its factorization.

70445839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64184.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 70445839 is about 8393.2019515796. The cubic root of 70445839 is about 413.0016454663.

The spelling of 70445839 in words is "seventy million, four hundred forty-five thousand, eight hundred thirty-nine".