38777213 has 2 divisors, whose sum is σ = 38777214. Its totient is φ = 38777212.

The previous prime is 38777201. The next prime is 38777227. The reversal of 38777213 is 31277783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23551609 + 15225604 = 4853^2 + 3902^2 .

It is an emirp because it is prime and its reverse (31277783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38777213 - 2⁴ = 38777197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38777113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19388606 + 19388607.

It is an arithmetic number, because the mean of its divisors is an integer number (19388607).

Almost surely, 2^38777213 is an apocalyptic number.

It is an amenable number.

38777213 is a deficient number, since it is larger than the sum of its proper divisors (1).

38777213 is an equidigital number, since it uses as much as digits as its factorization.

38777213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 38.

The square root of 38777213 is about 6227.1352161327. The cubic root of 38777213 is about 338.4741690574.

The spelling of 38777213 in words is "thirty-eight million, seven hundred seventy-seven thousand, two hundred thirteen".