1293091951 has 2 divisors, whose sum is σ = 1293091952. Its totient is φ = 1293091950.

The previous prime is 1293091937. The next prime is 1293091957. The reversal of 1293091951 is 1591903921.

It is a strong prime.

It is an emirp because it is prime and its reverse (1591903921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1293091951 - 2⁹ = 1293091439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1293091957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 646545975 + 646545976.

It is an arithmetic number, because the mean of its divisors is an integer number (646545976).

Almost surely, 2^1293091951 is an apocalyptic number.

1293091951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1293091951 is an equidigital number, since it uses as much as digits as its factorization.

1293091951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21870, while the sum is 40.

The square root of 1293091951 is about 35959.5877479150. The cubic root of 1293091951 is about 1089.4562703509.

The spelling of 1293091951 in words is "one billion, two hundred ninety-three million, ninety-one thousand, nine hundred fifty-one".