1978326101 has 8 divisors (see below), whose sum is σ = 2097337344. Its totient is φ = 1862764560.

The previous prime is 1978326067. The next prime is 1978326107. The reversal of 1978326101 is 1016238791.

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

It is a cyclic number.

It is not a de Polignac number, because 1978326101 - 2¹⁴ = 1978309717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1978326107) 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, 861245 + ... + 863538.

It is an arithmetic number, because the mean of its divisors is an integer number (262167168).

Almost surely, 2^1978326101 is an apocalyptic number.

It is an amenable number.

1978326101 is a deficient number, since it is larger than the sum of its proper divisors (119011243).

1978326101 is a wasteful number, since it uses less digits than its factorization.

1978326101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1724851.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 1978326101 is about 44478.3779043256. The cubic root of 1978326101 is about 1255.3532761001.

The spelling of 1978326101 in words is "one billion, nine hundred seventy-eight million, three hundred twenty-six thousand, one hundred one".