100331389 has 2 divisors, whose sum is σ = 100331390. Its totient is φ = 100331388.

The previous prime is 100331369. The next prime is 100331393. The reversal of 100331389 is 983133001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73239364 + 27092025 = 8558^2 + 5205^2 .

It is a cyclic number.

It is not a de Polignac number, because 100331389 - 2⁷ = 100331261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100331369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50165694 + 50165695.

It is an arithmetic number, because the mean of its divisors is an integer number (50165695).

Almost surely, 2^100331389 is an apocalyptic number.

It is an amenable number.

100331389 is a deficient number, since it is larger than the sum of its proper divisors (1).

100331389 is an equidigital number, since it uses as much as digits as its factorization.

100331389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 100331389 is about 10016.5557453648. Note that the first 3 decimals coincide. The cubic root of 100331389 is about 464.6710418589.

The spelling of 100331389 in words is "one hundred million, three hundred thirty-one thousand, three hundred eighty-nine".