71349569 has 4 divisors (see below), whose sum is σ = 73651200. Its totient is φ = 69047940.

The previous prime is 71349559. The next prime is 71349587. The reversal of 71349569 is 96594317.

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 71349569 - 2¹⁶ = 71284033 is a prime.

It is a super-2 number, since 2×71349569² = 10181521992971522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71349559) 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, 1150769 + ... + 1150830.

It is an arithmetic number, because the mean of its divisors is an integer number (18412800).

Almost surely, 2^71349569 is an apocalyptic number.

It is an amenable number.

71349569 is a deficient number, since it is larger than the sum of its proper divisors (2301631).

71349569 is a wasteful number, since it uses less digits than its factorization.

71349569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2301630.

The product of its digits is 204120, while the sum is 44.

The square root of 71349569 is about 8446.8674075068. The cubic root of 71349569 is about 414.7602408587.

The spelling of 71349569 in words is "seventy-one million, three hundred forty-nine thousand, five hundred sixty-nine".