38213893 has 2 divisors, whose sum is σ = 38213894. Its totient is φ = 38213892.

The previous prime is 38213869. The next prime is 38213897. The reversal of 38213893 is 39831283.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38155329 + 58564 = 6177^2 + 242^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38213893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38213897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19106946 + 19106947.

It is an arithmetic number, because the mean of its divisors is an integer number (19106947).

Almost surely, 2^38213893 is an apocalyptic number.

It is an amenable number.

38213893 is a deficient number, since it is larger than the sum of its proper divisors (1).

38213893 is an equidigital number, since it uses as much as digits as its factorization.

38213893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 38213893 is about 6181.7386712801. The cubic root of 38213893 is about 336.8271529508.

The spelling of 38213893 in words is "thirty-eight million, two hundred thirteen thousand, eight hundred ninety-three".