100473781 has 2 divisors, whose sum is σ = 100473782. Its totient is φ = 100473780.

The previous prime is 100473727. The next prime is 100473797. The reversal of 100473781 is 187374001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52794756 + 47679025 = 7266^2 + 6905^2 .

It is a cyclic number.

It is not a de Polignac number, because 100473781 - 2¹⁵ = 100441013 is a prime.

It is a super-2 number, since 2×100473781² = 20189961336871922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100473721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50236890 + 50236891.

It is an arithmetic number, because the mean of its divisors is an integer number (50236891).

Almost surely, 2^100473781 is an apocalyptic number.

It is an amenable number.

100473781 is a deficient number, since it is larger than the sum of its proper divisors (1).

100473781 is an equidigital number, since it uses as much as digits as its factorization.

100473781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 100473781 is about 10023.6610577174. The cubic root of 100473781 is about 464.8907609427.

The spelling of 100473781 in words is "one hundred million, four hundred seventy-three thousand, seven hundred eighty-one".