100492981 has 2 divisors, whose sum is σ = 100492982. Its totient is φ = 100492980.

The previous prime is 100492963. The next prime is 100492993. The reversal of 100492981 is 189294001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57380625 + 43112356 = 7575^2 + 6566^2 .

It is a cyclic number.

It is not a de Polignac number, because 100492981 - 2⁷ = 100492853 is a prime.

It is a super-2 number, since 2×100492981² = 20197678460532722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100492921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50246490 + 50246491.

It is an arithmetic number, because the mean of its divisors is an integer number (50246491).

Almost surely, 2^100492981 is an apocalyptic number.

It is an amenable number.

100492981 is a deficient number, since it is larger than the sum of its proper divisors (1).

100492981 is an equidigital number, since it uses as much as digits as its factorization.

100492981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 100492981 is about 10024.6187458676. The cubic root of 100492981 is about 464.9203717660.

The spelling of 100492981 in words is "one hundred million, four hundred ninety-two thousand, nine hundred eighty-one".