38377813 has 2 divisors, whose sum is σ = 38377814. Its totient is φ = 38377812.

The previous prime is 38377799. The next prime is 38377831. The reversal of 38377813 is 31877383.

Together with next prime (38377831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33097009 + 5280804 = 5753^2 + 2298^2 .

It is a cyclic number.

It is not a de Polignac number, because 38377813 - 2²¹ = 36280661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38327813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19188906 + 19188907.

It is an arithmetic number, because the mean of its divisors is an integer number (19188907).

Almost surely, 2^38377813 is an apocalyptic number.

It is an amenable number.

38377813 is a deficient number, since it is larger than the sum of its proper divisors (1).

38377813 is an equidigital number, since it uses as much as digits as its factorization.

38377813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 40.

The square root of 38377813 is about 6194.9828894033. The cubic root of 38377813 is about 337.3080770728.

The spelling of 38377813 in words is "thirty-eight million, three hundred seventy-seven thousand, eight hundred thirteen".