71999473 has 32 divisors (see below), whose sum is σ = 92153600. Its totient is φ = 55883520.

The previous prime is 71999449. The next prime is 71999497. The reversal of 71999473 is 37499917.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (71999449) and next prime (71999497).

It is not a de Polignac number, because 71999473 - 2¹³ = 71991281 is a prime.

It is a super-2 number, since 2×71999473² = 10367848224555458, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (71999423) 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, 298633 + ... + 298873.

It is an arithmetic number, because the mean of its divisors is an integer number (2879800).

Almost surely, 2^71999473 is an apocalyptic number.

It is an amenable number.

71999473 is a deficient number, since it is larger than the sum of its proper divisors (20154127).

71999473 is a wasteful number, since it uses less digits than its factorization.

71999473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 328 counting only the distinct ones).

The product of its digits is 428652, while the sum is 49.

The square root of 71999473 is about 8485.2503204089. The cubic root of 71999473 is about 416.0157496040.

The spelling of 71999473 in words is "seventy-one million, nine hundred ninety-nine thousand, four hundred seventy-three".