1238158853 has 2 divisors, whose sum is σ = 1238158854. Its totient is φ = 1238158852.

The previous prime is 1238158843. The next prime is 1238158903. The reversal of 1238158853 is 3588518321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1171213729 + 66945124 = 34223^2 + 8182^2 .

It is a cyclic number.

It is not a de Polignac number, because 1238158853 - 2²² = 1233964549 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1238158843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619079426 + 619079427.

It is an arithmetic number, because the mean of its divisors is an integer number (619079427).

Almost surely, 2^1238158853 is an apocalyptic number.

1238158853 is the 18809-th centered heptagonal number.

It is an amenable number.

1238158853 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238158853 is an equidigital number, since it uses as much as digits as its factorization.

1238158853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 230400, while the sum is 44.

The square root of 1238158853 is about 35187.4814813450. The cubic root of 1238158853 is about 1073.8050838209.

The spelling of 1238158853 in words is "one billion, two hundred thirty-eight million, one hundred fifty-eight thousand, eight hundred fifty-three".