101976981 has 16 divisors (see below), whose sum is σ = 139484928. Its totient is φ = 66240000.

The previous prime is 101976977. The next prime is 101976983. The reversal of 101976981 is 189679101.

It is not a de Polignac number, because 101976981 - 2² = 101976977 is a prime.

It is a super-2 number, since 2×101976981² = 20798609307748722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101976983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32481 + ... + 35481.

It is an arithmetic number, because the mean of its divisors is an integer number (8717808).

Almost surely, 2^101976981 is an apocalyptic number.

It is an amenable number.

101976981 is a deficient number, since it is larger than the sum of its proper divisors (37507947).

101976981 is a wasteful number, since it uses less digits than its factorization.

101976981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3292.

The product of its (nonzero) digits is 27216, while the sum is 42.

The square root of 101976981 is about 10098.3652637444. The cubic root of 101976981 is about 467.1977223693.

The spelling of 101976981 in words is "one hundred one million, nine hundred seventy-six thousand, nine hundred eighty-one".