38439967 has 2 divisors, whose sum is σ = 38439968. Its totient is φ = 38439966.

The previous prime is 38439949. The next prime is 38439971. The reversal of 38439967 is 76993483.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38439967 - 2¹⁹ = 37915679 is a prime.

It is a super-2 number, since 2×38439967² = 2955262125922178, 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 38439967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38439997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19219983 + 19219984.

It is an arithmetic number, because the mean of its divisors is an integer number (19219984).

Almost surely, 2^38439967 is an apocalyptic number.

38439967 is a deficient number, since it is larger than the sum of its proper divisors (1).

38439967 is an equidigital number, since it uses as much as digits as its factorization.

38439967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 49.

The square root of 38439967 is about 6199.9973387091. The cubic root of 38439967 is about 337.4900723189.

The spelling of 38439967 in words is "thirty-eight million, four hundred thirty-nine thousand, nine hundred sixty-seven".