38446813 has 2 divisors, whose sum is σ = 38446814. Its totient is φ = 38446812.

The previous prime is 38446801. The next prime is 38446831. The reversal of 38446813 is 31864483.

Together with next prime (38446831) 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., 24029604 + 14417209 = 4902^2 + 3797^2 .

It is a cyclic number.

It is not a de Polignac number, because 38446813 - 2⁹ = 38446301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38446883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19223406 + 19223407.

It is an arithmetic number, because the mean of its divisors is an integer number (19223407).

Almost surely, 2^38446813 is an apocalyptic number.

It is an amenable number.

38446813 is a deficient number, since it is larger than the sum of its proper divisors (1).

38446813 is an equidigital number, since it uses as much as digits as its factorization.

38446813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 37.

The square root of 38446813 is about 6200.5494111409. The cubic root of 38446813 is about 337.5101063275.

The spelling of 38446813 in words is "thirty-eight million, four hundred forty-six thousand, eight hundred thirteen".