1293948157 has 2 divisors, whose sum is σ = 1293948158. Its totient is φ = 1293948156.

The previous prime is 1293948133. The next prime is 1293948163. The reversal of 1293948157 is 7518493921.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1117297476 + 176650681 = 33426^2 + 13291^2 .

It is a cyclic number.

It is not a de Polignac number, because 1293948157 - 2²³ = 1285559549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1293948157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1293948107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 646974078 + 646974079.

It is an arithmetic number, because the mean of its divisors is an integer number (646974079).

Almost surely, 2^1293948157 is an apocalyptic number.

It is an amenable number.

1293948157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1293948157 is an equidigital number, since it uses as much as digits as its factorization.

1293948157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 49.

The square root of 1293948157 is about 35971.4908920940. The cubic root of 1293948157 is about 1089.6966742886.

The spelling of 1293948157 in words is "one billion, two hundred ninety-three million, nine hundred forty-eight thousand, one hundred fifty-seven".