71499013 has 4 divisors (see below), whose sum is σ = 71573920. Its totient is φ = 71424108.

The previous prime is 71498993. The next prime is 71499023. The reversal of 71499013 is 31099417.

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 71499013 - 2¹⁷ = 71367941 is a prime.

It is a super-2 number, since 2×71499013² = 10224217719948338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71499013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71499023) 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, 36003 + ... + 37936.

It is an arithmetic number, because the mean of its divisors is an integer number (17893480).

Almost surely, 2^71499013 is an apocalyptic number.

It is an amenable number.

71499013 is a deficient number, since it is larger than the sum of its proper divisors (74907).

71499013 is an equidigital number, since it uses as much as digits as its factorization.

71499013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74906.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 71499013 is about 8455.7088999090. The cubic root of 71499013 is about 415.0496152032.

The spelling of 71499013 in words is "seventy-one million, four hundred ninety-nine thousand, thirteen".