100078061 has 2 divisors, whose sum is σ = 100078062. Its totient is φ = 100078060.

The previous prime is 100078051. The next prime is 100078067. The reversal of 100078061 is 160870001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99880036 + 198025 = 9994^2 + 445^2 .

It is a cyclic number.

It is not a de Polignac number, because 100078061 - 2¹⁸ = 99815917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100078067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50039030 + 50039031.

It is an arithmetic number, because the mean of its divisors is an integer number (50039031).

Almost surely, 2^100078061 is an apocalyptic number.

It is an amenable number.

100078061 is a deficient number, since it is larger than the sum of its proper divisors (1).

100078061 is an equidigital number, since it uses as much as digits as its factorization.

100078061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 100078061 is about 10003.9022886072. The cubic root of 100078061 is about 464.2796276373.

The spelling of 100078061 in words is "one hundred million, seventy-eight thousand, sixty-one".