101978495 has 16 divisors (see below), whose sum is σ = 129820320. Its totient is φ = 76637184.

The previous prime is 101978473. The next prime is 101978497. The reversal of 101978495 is 594879101.

It is a cyclic number.

It is not a de Polignac number, because 101978495 - 2¹⁰ = 101977471 is a prime.

It is a super-3 number, since 3×101978495³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101978497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68024 + ... + 69506.

It is an arithmetic number, because the mean of its divisors is an integer number (8113770).

Almost surely, 2^101978495 is an apocalyptic number.

101978495 is a deficient number, since it is larger than the sum of its proper divisors (27841825).

101978495 is a wasteful number, since it uses less digits than its factorization.

101978495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2314.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 101978495 is about 10098.4402260943. The cubic root of 101978495 is about 467.2000344396.

The spelling of 101978495 in words is "one hundred one million, nine hundred seventy-eight thousand, four hundred ninety-five".