1317949078 has 4 divisors (see below), whose sum is σ = 1976923620. Its totient is φ = 658974538.

The previous prime is 1317949069. The next prime is 1317949093. The reversal of 1317949078 is 8709497131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8709497131 = 32063 ⋅271637.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329487268 + ... + 329487271.

It is an arithmetic number, because the mean of its divisors is an integer number (494230905).

Almost surely, 2^1317949078 is an apocalyptic number.

1317949078 is a deficient number, since it is larger than the sum of its proper divisors (658974542).

1317949078 is an equidigital number, since it uses as much as digits as its factorization.

1317949078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658974541.

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 1317949078 is about 36303.5683921016. The cubic root of 1317949078 is about 1096.3928892049.

The spelling of 1317949078 in words is "one billion, three hundred seventeen million, nine hundred forty-nine thousand, seventy-eight".