72770143 has 2 divisors, whose sum is σ = 72770144. Its totient is φ = 72770142.

The previous prime is 72770141. The next prime is 72770161. The reversal of 72770143 is 34107727.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72770143 - 2¹ = 72770141 is a prime.

Together with 72770141, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72770141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36385071 + 36385072.

It is an arithmetic number, because the mean of its divisors is an integer number (36385072).

Almost surely, 2^72770143 is an apocalyptic number.

72770143 is a deficient number, since it is larger than the sum of its proper divisors (1).

72770143 is an equidigital number, since it uses as much as digits as its factorization.

72770143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 72770143 is about 8530.5417764641. The cubic root of 72770143 is about 417.4948052947.

The spelling of 72770143 in words is "seventy-two million, seven hundred seventy thousand, one hundred forty-three".