72658471 has 2 divisors, whose sum is σ = 72658472. Its totient is φ = 72658470.

The previous prime is 72658463. The next prime is 72658477. The reversal of 72658471 is 17485627.

It is a strong prime.

It is an emirp because it is prime and its reverse (17485627) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72658471 - 2³ = 72658463 is a prime.

It is a super-3 number, since 3×72658471³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72658477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36329235 + 36329236.

It is an arithmetic number, because the mean of its divisors is an integer number (36329236).

Almost surely, 2^72658471 is an apocalyptic number.

72658471 is a deficient number, since it is larger than the sum of its proper divisors (1).

72658471 is an equidigital number, since it uses as much as digits as its factorization.

72658471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 40.

The square root of 72658471 is about 8523.9938409175. The cubic root of 72658471 is about 417.2811354797.

The spelling of 72658471 in words is "seventy-two million, six hundred fifty-eight thousand, four hundred seventy-one".