72878543 has 2 divisors, whose sum is σ = 72878544. Its totient is φ = 72878542.

The previous prime is 72878521. The next prime is 72878549. The reversal of 72878543 is 34587827.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72878543 - 2¹² = 72874447 is a prime.

It is a super-2 number, since 2×72878543² = 10622564059605698, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 72878494 and 72878503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72878549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36439271 + 36439272.

It is an arithmetic number, because the mean of its divisors is an integer number (36439272).

Almost surely, 2^72878543 is an apocalyptic number.

72878543 is a deficient number, since it is larger than the sum of its proper divisors (1).

72878543 is an equidigital number, since it uses as much as digits as its factorization.

72878543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 376320, while the sum is 44.

The square root of 72878543 is about 8536.8930530961. The cubic root of 72878543 is about 417.7020055829.

The spelling of 72878543 in words is "seventy-two million, eight hundred seventy-eight thousand, five hundred forty-three".