100704781 has 2 divisors, whose sum is σ = 100704782. Its totient is φ = 100704780.

The previous prime is 100704763. The next prime is 100704797. The reversal of 100704781 is 187407001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99102025 + 1602756 = 9955^2 + 1266^2 .

It is a cyclic number.

It is not a de Polignac number, because 100704781 - 2¹⁷ = 100573709 is a prime.

It is a super-2 number, since 2×100704781² = 20282905832515922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100704881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50352390 + 50352391.

It is an arithmetic number, because the mean of its divisors is an integer number (50352391).

Almost surely, 2^100704781 is an apocalyptic number.

It is an amenable number.

100704781 is a deficient number, since it is larger than the sum of its proper divisors (1).

100704781 is an equidigital number, since it uses as much as digits as its factorization.

100704781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 100704781 is about 10035.1771783063. The cubic root of 100704781 is about 465.2467661595.

The spelling of 100704781 in words is "one hundred million, seven hundred four thousand, seven hundred eighty-one".