72434081 has 2 divisors, whose sum is σ = 72434082. Its totient is φ = 72434080.

The previous prime is 72434057. The next prime is 72434113. The reversal of 72434081 is 18043427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38328481 + 34105600 = 6191^2 + 5840^2 .

It is a cyclic number.

It is not a de Polignac number, because 72434081 - 2¹⁰ = 72433057 is a prime.

It is a super-2 number, since 2×72434081² = 10493392180629122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72434041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36217040 + 36217041.

It is an arithmetic number, because the mean of its divisors is an integer number (36217041).

Almost surely, 2^72434081 is an apocalyptic number.

It is an amenable number.

72434081 is a deficient number, since it is larger than the sum of its proper divisors (1).

72434081 is an equidigital number, since it uses as much as digits as its factorization.

72434081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 72434081 is about 8510.8214057164. The cubic root of 72434081 is about 416.8511316202.

The spelling of 72434081 in words is "seventy-two million, four hundred thirty-four thousand, eighty-one".