71924489 has 8 divisors (see below), whose sum is σ = 88522560. Its totient is φ = 56907216.

The previous prime is 71924477. The next prime is 71924497. The reversal of 71924489 is 98442917.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71924489 is a prime.

It is a super-2 number, since 2×71924489² = 10346264235822242, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71924449) 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, 395099 + ... + 395280.

It is an arithmetic number, because the mean of its divisors is an integer number (11065320).

Almost surely, 2^71924489 is an apocalyptic number.

It is an amenable number.

71924489 is a deficient number, since it is larger than the sum of its proper divisors (16598071).

71924489 is a wasteful number, since it uses less digits than its factorization.

71924489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790399.

The product of its digits is 145152, while the sum is 44.

The square root of 71924489 is about 8480.8306786541. The cubic root of 71924489 is about 415.8712792853.

The spelling of 71924489 in words is "seventy-one million, nine hundred twenty-four thousand, four hundred eighty-nine".