71490513 has 4 divisors (see below), whose sum is σ = 95320688. Its totient is φ = 47660340.

The previous prime is 71490479. The next prime is 71490547. The reversal of 71490513 is 31509417.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31509417 = 3 ⋅10503139.

It is an interprime number because it is at equal distance from previous prime (71490479) and next prime (71490547).

It is not a de Polignac number, because 71490513 - 2⁸ = 71490257 is a prime.

It is a super-2 number, since 2×71490513² = 10221786898006338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71490563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11915083 + ... + 11915088.

It is an arithmetic number, because the mean of its divisors is an integer number (23830172).

Almost surely, 2^71490513 is an apocalyptic number.

It is an amenable number.

71490513 is a deficient number, since it is larger than the sum of its proper divisors (23830175).

71490513 is a wasteful number, since it uses less digits than its factorization.

71490513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23830174.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 71490513 is about 8455.2062659642. The cubic root of 71490513 is about 415.0331671368.

The spelling of 71490513 in words is "seventy-one million, four hundred ninety thousand, five hundred thirteen".