71263389 has 8 divisors (see below), whose sum is σ = 98083072. Its totient is φ = 45976320.

The previous prime is 71263373. The next prime is 71263447. The reversal of 71263389 is 98336217.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71263389 - 2⁴ = 71263373 is a prime.

It is a super-2 number, since 2×71263389² = 10156941223530642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71263349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383044 + ... + 383229.

It is an arithmetic number, because the mean of its divisors is an integer number (12260384).

Almost surely, 2^71263389 is an apocalyptic number.

It is an amenable number.

71263389 is a deficient number, since it is larger than the sum of its proper divisors (26819683).

71263389 is a wasteful number, since it uses less digits than its factorization.

71263389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766307.

The product of its digits is 54432, while the sum is 39.

The square root of 71263389 is about 8441.7645667242. The cubic root of 71263389 is about 414.5931833747.

The spelling of 71263389 in words is "seventy-one million, two hundred sixty-three thousand, three hundred eighty-nine".