1238622157 has 2 divisors, whose sum is σ = 1238622158. Its totient is φ = 1238622156.

The previous prime is 1238622149. The next prime is 1238622163. The reversal of 1238622157 is 7512268321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 837581481 + 401040676 = 28941^2 + 20026^2 .

It is a cyclic number.

It is not a de Polignac number, because 1238622157 - 2³ = 1238622149 is a prime.

It is a super-2 number, since 2×1238622157² = 3068369695622665298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1238622127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619311078 + 619311079.

It is an arithmetic number, because the mean of its divisors is an integer number (619311079).

Almost surely, 2^1238622157 is an apocalyptic number.

It is an amenable number.

1238622157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238622157 is an equidigital number, since it uses as much as digits as its factorization.

1238622157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 1238622157 is about 35194.0642296396. The cubic root of 1238622157 is about 1073.9390020575.

It can be divided in two parts, 12386 and 22157, that added together give a palindrome (34543).

The spelling of 1238622157 in words is "one billion, two hundred thirty-eight million, six hundred twenty-two thousand, one hundred fifty-seven".