1278952903 has 2 divisors, whose sum is σ = 1278952904. Its totient is φ = 1278952902.

The previous prime is 1278952849. The next prime is 1278953003. The reversal of 1278952903 is 3092598721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1278952903 - 2²¹ = 1276855751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1278952603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639476451 + 639476452.

It is an arithmetic number, because the mean of its divisors is an integer number (639476452).

Almost surely, 2^1278952903 is an apocalyptic number.

1278952903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1278952903 is an equidigital number, since it uses as much as digits as its factorization.

1278952903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 1278952903 is about 35762.4510205886. The cubic root of 1278952903 is about 1085.4708972706.

The spelling of 1278952903 in words is "one billion, two hundred seventy-eight million, nine hundred fifty-two thousand, nine hundred three".