1371359978 has 16 divisors (see below), whose sum is σ = 2178918144. Its totient is φ = 645086400.

The previous prime is 1371359963. The next prime is 1371359993. The reversal of 1371359978 is 8799531731.

It is an interprime number because it is at equal distance from previous prime (1371359963) and next prime (1371359993).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97703 + ... + 110853.

It is an arithmetic number, because the mean of its divisors is an integer number (136182384).

Almost surely, 2^1371359978 is an apocalyptic number.

1371359978 is a deficient number, since it is larger than the sum of its proper divisors (807558166).

1371359978 is a wasteful number, since it uses less digits than its factorization.

1371359978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16237.

The product of its digits is 1428840, while the sum is 53.

The square root of 1371359978 is about 37031.8778621879. The cubic root of 1371359978 is about 1111.0079252184.

The spelling of 1371359978 in words is "one billion, three hundred seventy-one million, three hundred fifty-nine thousand, nine hundred seventy-eight".