38654639 has 2 divisors, whose sum is σ = 38654640. Its totient is φ = 38654638.

The previous prime is 38654591. The next prime is 38654647. The reversal of 38654639 is 93645683.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38654639 - 2²⁴ = 21877423 is a prime.

It is a super-2 number, since 2×38654639² = 2988362232440642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 38654639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38654689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19327319 + 19327320.

It is an arithmetic number, because the mean of its divisors is an integer number (19327320).

Almost surely, 2^38654639 is an apocalyptic number.

38654639 is a deficient number, since it is larger than the sum of its proper divisors (1).

38654639 is an equidigital number, since it uses as much as digits as its factorization.

38654639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 44.

The square root of 38654639 is about 6217.2855009240. The cubic root of 38654639 is about 338.1171559140.

It can be divided in two parts, 38654 and 639, that multiplied together give a triangular number (24699906 = T₇₀₂₈).

The spelling of 38654639 in words is "thirty-eight million, six hundred fifty-four thousand, six hundred thirty-nine".