71020789 has 4 divisors (see below), whose sum is σ = 81166624. Its totient is φ = 60874956.

The previous prime is 71020787. The next prime is 71020801. The reversal of 71020789 is 98702017.

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 71020789 - 2¹ = 71020787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71020787) 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, 5072907 + ... + 5072920.

It is an arithmetic number, because the mean of its divisors is an integer number (20291656).

Almost surely, 2^71020789 is an apocalyptic number.

It is an amenable number.

71020789 is a deficient number, since it is larger than the sum of its proper divisors (10145835).

71020789 is a wasteful number, since it uses less digits than its factorization.

71020789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10145834.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 71020789 is about 8427.3832830838. The cubic root of 71020789 is about 414.1221857685.

The spelling of 71020789 in words is "seventy-one million, twenty thousand, seven hundred eighty-nine".