71490783 has 32 divisors (see below), whose sum is σ = 117838336. Its totient is φ = 37542528.

The previous prime is 71490779. The next prime is 71490803. The reversal of 71490783 is 38709417.

It is not a de Polignac number, because 71490783 - 2² = 71490779 is a prime.

It is a super-2 number, since 2×71490783² = 10221864107906178, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71490733) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83385 + ... + 84237.

It is an arithmetic number, because the mean of its divisors is an integer number (3682448).

Almost surely, 2^71490783 is an apocalyptic number.

71490783 is a deficient number, since it is larger than the sum of its proper divisors (46347553).

71490783 is a wasteful number, since it uses less digits than its factorization.

71490783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 71490783 is about 8455.2222324431. Note that the first 4 decimals coincide. The cubic root of 71490783 is about 415.0336896248.

The spelling of 71490783 in words is "seventy-one million, four hundred ninety thousand, seven hundred eighty-three".