1978122903 has 8 divisors (see below), whose sum is σ = 2637706368. Its totient is φ = 1318644024.

The previous prime is 1978122899. The next prime is 1978122943. The reversal of 1978122903 is 3092218791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1978122903 - 2² = 1978122899 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1978122943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48150 + ... + 79212.

It is an arithmetic number, because the mean of its divisors is an integer number (329713296).

Almost surely, 2^1978122903 is an apocalyptic number.

1978122903 is a deficient number, since it is larger than the sum of its proper divisors (659583465).

1978122903 is a wasteful number, since it uses less digits than its factorization.

1978122903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52293.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 1978122903 is about 44476.0936121868. The cubic root of 1978122903 is about 1255.3102946441.

The spelling of 1978122903 in words is "one billion, nine hundred seventy-eight million, one hundred twenty-two thousand, nine hundred three".