38472043639 has 2 divisors, whose sum is σ = 38472043640. Its totient is φ = 38472043638.

The previous prime is 38472043637. The next prime is 38472043663. The reversal of 38472043639 is 93634027483.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38472043639 - 2¹ = 38472043637 is a prime.

It is a super-2 number, since 2×38472043639² (a number of 22 digits) contains 22 as substring.

Together with 38472043637, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 38472043592 and 38472043601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38472043637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19236021819 + 19236021820.

It is an arithmetic number, because the mean of its divisors is an integer number (19236021820).

Almost surely, 2^38472043639 is an apocalyptic number.

38472043639 is a deficient number, since it is larger than the sum of its proper divisors (1).

38472043639 is an equidigital number, since it uses as much as digits as its factorization.

38472043639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 49.

The spelling of 38472043639 in words is "thirty-eight billion, four hundred seventy-two million, forty-three thousand, six hundred thirty-nine".