388642069229 has 4 divisors (see below), whose sum is σ = 388664560476. Its totient is φ = 388619577984.

The previous prime is 388642069223. The next prime is 388642069241. The reversal of 388642069229 is 922960246883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 922960246883 = 307 ⋅3006385169.

It can be written as a sum of positive squares in 2 ways, for example, as 143923873129 + 244718196100 = 379373^2 + 494690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-388642069229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388642069223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11219684 + ... + 11254269.

It is an arithmetic number, because the mean of its divisors is an integer number (97166140119).

Almost surely, 2^388642069229 is an apocalyptic number.

It is an amenable number.

388642069229 is a deficient number, since it is larger than the sum of its proper divisors (22491247).

388642069229 is a wasteful number, since it uses less digits than its factorization.

388642069229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22491246.

The product of its (nonzero) digits is 17915904, while the sum is 59.

The spelling of 388642069229 in words is "three hundred eighty-eight billion, six hundred forty-two million, sixty-nine thousand, two hundred twenty-nine".