137638888997 has 2 divisors, whose sum is σ = 137638888998. Its totient is φ = 137638888996.

The previous prime is 137638888967. The next prime is 137638889111. The reversal of 137638888997 is 799888836731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72657741601 + 64981147396 = 269551^2 + 254914^2 .

It is a cyclic number.

It is not a de Polignac number, because 137638888997 - 2¹⁰ = 137638887973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137638888967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68819444498 + 68819444499.

It is an arithmetic number, because the mean of its divisors is an integer number (68819444499).

Almost surely, 2^137638888997 is an apocalyptic number.

It is an amenable number.

137638888997 is a deficient number, since it is larger than the sum of its proper divisors (1).

137638888997 is an equidigital number, since it uses as much as digits as its factorization.

137638888997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 877879296, while the sum is 77.

The spelling of 137638888997 in words is "one hundred thirty-seven billion, six hundred thirty-eight million, eight hundred eighty-eight thousand, nine hundred ninety-seven".