38979977 has 2 divisors, whose sum is σ = 38979978. Its totient is φ = 38979976.

The previous prime is 38979947. The next prime is 38980003. The reversal of 38979977 is 77997983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26666896 + 12313081 = 5164^2 + 3509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38979977 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (38979937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19489988 + 19489989.

It is an arithmetic number, because the mean of its divisors is an integer number (19489989).

Almost surely, 2^38979977 is an apocalyptic number.

It is an amenable number.

38979977 is a deficient number, since it is larger than the sum of its proper divisors (1).

38979977 is an equidigital number, since it uses as much as digits as its factorization.

38979977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6001128, while the sum is 59.

The square root of 38979977 is about 6243.3946695688. The cubic root of 38979977 is about 339.0630982753.

The spelling of 38979977 in words is "thirty-eight million, nine hundred seventy-nine thousand, nine hundred seventy-seven".