978149141 has 4 divisors (see below), whose sum is σ = 994728000. Its totient is φ = 961570284.

The previous prime is 978149113. The next prime is 978149171. The reversal of 978149141 is 141941879.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 141941879 = 37 ⋅3836267.

It is a cyclic number.

It is not a de Polignac number, because 978149141 - 2¹⁸ = 977886997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 978149092 and 978149101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978149171) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8289341 + ... + 8289458.

It is an arithmetic number, because the mean of its divisors is an integer number (248682000).

Almost surely, 2^978149141 is an apocalyptic number.

It is an amenable number.

978149141 is a deficient number, since it is larger than the sum of its proper divisors (16578859).

978149141 is a wasteful number, since it uses less digits than its factorization.

978149141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16578858.

The product of its digits is 72576, while the sum is 44.

The square root of 978149141 is about 31275.3759529762. The cubic root of 978149141 is about 992.6626756766.

The spelling of 978149141 in words is "nine hundred seventy-eight million, one hundred forty-nine thousand, one hundred forty-one".