38677993 has 2 divisors, whose sum is σ = 38677994. Its totient is φ = 38677992.

The previous prime is 38677957. The next prime is 38678023. The reversal of 38677993 is 39977683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36638809 + 2039184 = 6053^2 + 1428^2 .

It is a cyclic number.

It is not a de Polignac number, because 38677993 - 2¹³ = 38669801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38677993.

It is not a weakly prime, because it can be changed into another prime (38677943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19338996 + 19338997.

It is an arithmetic number, because the mean of its divisors is an integer number (19338997).

Almost surely, 2^38677993 is an apocalyptic number.

It is an amenable number.

38677993 is a deficient number, since it is larger than the sum of its proper divisors (1).

38677993 is an equidigital number, since it uses as much as digits as its factorization.

38677993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 52.

The square root of 38677993 is about 6219.1633681710. The cubic root of 38677993 is about 338.1852356973.

The spelling of 38677993 in words is "thirty-eight million, six hundred seventy-seven thousand, nine hundred ninety-three".