72839077 has 2 divisors, whose sum is σ = 72839078. Its totient is φ = 72839076.

The previous prime is 72839059. The next prime is 72839093. The reversal of 72839077 is 77093827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72437121 + 401956 = 8511^2 + 634^2 .

It is a cyclic number.

It is not a de Polignac number, because 72839077 - 2¹¹ = 72837029 is a prime.

It is a super-2 number, since 2×72839077² = 10611062276423858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72839177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36419538 + 36419539.

It is an arithmetic number, because the mean of its divisors is an integer number (36419539).

Almost surely, 2^72839077 is an apocalyptic number.

It is an amenable number.

72839077 is a deficient number, since it is larger than the sum of its proper divisors (1).

72839077 is an equidigital number, since it uses as much as digits as its factorization.

72839077 is an evil number, because the sum of its binary digits is even.

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

The square root of 72839077 is about 8534.5812433886. The cubic root of 72839077 is about 417.6265924216.

The spelling of 72839077 in words is "seventy-two million, eight hundred thirty-nine thousand, seventy-seven".