72923471 has 2 divisors, whose sum is σ = 72923472. Its totient is φ = 72923470.

The previous prime is 72923449. The next prime is 72923491. The reversal of 72923471 is 17432927.

It is a strong prime.

It is an emirp because it is prime and its reverse (17432927) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72923471 - 2⁶ = 72923407 is a prime.

It is a super-3 number, since 3×72923471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72923401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36461735 + 36461736.

It is an arithmetic number, because the mean of its divisors is an integer number (36461736).

Almost surely, 2^72923471 is an apocalyptic number.

72923471 is a deficient number, since it is larger than the sum of its proper divisors (1).

72923471 is an equidigital number, since it uses as much as digits as its factorization.

72923471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 35.

The square root of 72923471 is about 8539.5240499691. The cubic root of 72923471 is about 417.7878226144.

The spelling of 72923471 in words is "seventy-two million, nine hundred twenty-three thousand, four hundred seventy-one".