70840243 has 4 divisors (see below), whose sum is σ = 73283040. Its totient is φ = 68397448.

The previous prime is 70840229. The next prime is 70840249. The reversal of 70840243 is 34204807.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70840243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70840249) 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, 1221355 + ... + 1221412.

It is an arithmetic number, because the mean of its divisors is an integer number (18320760).

Almost surely, 2^70840243 is an apocalyptic number.

70840243 is a deficient number, since it is larger than the sum of its proper divisors (2442797).

70840243 is a wasteful number, since it uses less digits than its factorization.

70840243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2442796.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 70840243 is about 8416.6646006598. The cubic root of 70840243 is about 413.7709667697.

The spelling of 70840243 in words is "seventy million, eight hundred forty thousand, two hundred forty-three".