71490643 has 8 divisors (see below), whose sum is σ = 81759488. Its totient is φ = 61235784.

The previous prime is 71490637. The next prime is 71490689. The reversal of 71490643 is 34609417.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 71490643 - 2¹³ = 71482451 is a prime.

It is a super-2 number, since 2×71490643² = 10221824073106898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71490599 and 71490608.

It is not an unprimeable number, because it can be changed into a prime (71490443) 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, 12130 + ... + 17032.

It is an arithmetic number, because the mean of its divisors is an integer number (10219936).

Almost surely, 2^71490643 is an apocalyptic number.

71490643 is a deficient number, since it is larger than the sum of its proper divisors (10268845).

71490643 is a wasteful number, since it uses less digits than its factorization.

71490643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6993.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 71490643 is about 8455.2139535319. The cubic root of 71490643 is about 415.0334187052.

The spelling of 71490643 in words is "seventy-one million, four hundred ninety thousand, six hundred forty-three".