38142791 has 2 divisors, whose sum is σ = 38142792. Its totient is φ = 38142790.

The previous prime is 38142787. The next prime is 38142817. The reversal of 38142791 is 19724183.

It is a weak prime.

It is an emirp because it is prime and its reverse (19724183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38142791 - 2² = 38142787 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38142721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19071395 + 19071396.

It is an arithmetic number, because the mean of its divisors is an integer number (19071396).

Almost surely, 2^38142791 is an apocalyptic number.

38142791 is a deficient number, since it is larger than the sum of its proper divisors (1).

38142791 is an equidigital number, since it uses as much as digits as its factorization.

38142791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 38142791 is about 6175.9850226502. The cubic root of 38142791 is about 336.6181194362.

The spelling of 38142791 in words is "thirty-eight million, one hundred forty-two thousand, seven hundred ninety-one".