70844561 has 4 divisors (see below), whose sum is σ = 71049072. Its totient is φ = 70640052.

The previous prime is 70844539. The next prime is 70844563. The reversal of 70844561 is 16544807.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 70844561 - 2⁶ = 70844497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70844563) 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, 101735 + ... + 102428.

It is an arithmetic number, because the mean of its divisors is an integer number (17762268).

Almost surely, 2^70844561 is an apocalyptic number.

It is an amenable number.

70844561 is a deficient number, since it is larger than the sum of its proper divisors (204511).

70844561 is a wasteful number, since it uses less digits than its factorization.

70844561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204510.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 70844561 is about 8416.9211116655. The cubic root of 70844561 is about 413.7793736049.

The spelling of 70844561 in words is "seventy million, eight hundred forty-four thousand, five hundred sixty-one".