83072779 has 2 divisors, whose sum is σ = 83072780. Its totient is φ = 83072778.

The previous prime is 83072771. The next prime is 83072809. The reversal of 83072779 is 97727038.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83072779 - 2³ = 83072771 is a prime.

It is a super-2 number, since 2×83072779² = 13802173221565682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (83072771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41536389 + 41536390.

It is an arithmetic number, because the mean of its divisors is an integer number (41536390).

Almost surely, 2^83072779 is an apocalyptic number.

83072779 is a deficient number, since it is larger than the sum of its proper divisors (1).

83072779 is an equidigital number, since it uses as much as digits as its factorization.

83072779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 83072779 is about 9114.4269704683. The cubic root of 83072779 is about 436.3345267421.

The spelling of 83072779 in words is "eighty-three million, seventy-two thousand, seven hundred seventy-nine".