67572779 has 2 divisors, whose sum is σ = 67572780. Its totient is φ = 67572778.

The previous prime is 67572751. The next prime is 67572787. The reversal of 67572779 is 97727576.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67572779 - 2²⁰ = 66524203 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67572749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33786389 + 33786390.

It is an arithmetic number, because the mean of its divisors is an integer number (33786390).

Almost surely, 2^67572779 is an apocalyptic number.

67572779 is a deficient number, since it is larger than the sum of its proper divisors (1).

67572779 is an equidigital number, since it uses as much as digits as its factorization.

67572779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296540, while the sum is 50.

The square root of 67572779 is about 8220.2663582149. The cubic root of 67572779 is about 407.3089251865.

The spelling of 67572779 in words is "sixty-seven million, five hundred seventy-two thousand, seven hundred seventy-nine".