38748421 has 2 divisors, whose sum is σ = 38748422. Its totient is φ = 38748420.

The previous prime is 38748401. The next prime is 38748439. The reversal of 38748421 is 12484783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38130625 + 617796 = 6175^2 + 786^2 .

It is a cyclic number.

It is not a de Polignac number, because 38748421 - 2⁷ = 38748293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38748401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19374210 + 19374211.

It is an arithmetic number, because the mean of its divisors is an integer number (19374211).

Almost surely, 2^38748421 is an apocalyptic number.

It is an amenable number.

38748421 is a deficient number, since it is larger than the sum of its proper divisors (1).

38748421 is an equidigital number, since it uses as much as digits as its factorization.

38748421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43008, while the sum is 37.

The square root of 38748421 is about 6224.8229693703. The cubic root of 38748421 is about 338.3903761931.

The spelling of 38748421 in words is "thirty-eight million, seven hundred forty-eight thousand, four hundred twenty-one".