101155493 has 2 divisors, whose sum is σ = 101155494. Its totient is φ = 101155492.

The previous prime is 101155489. The next prime is 101155499. The reversal of 101155493 is 394551101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76335169 + 24820324 = 8737^2 + 4982^2 .

It is a cyclic number.

It is not a de Polignac number, because 101155493 - 2² = 101155489 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 (101155499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50577746 + 50577747.

It is an arithmetic number, because the mean of its divisors is an integer number (50577747).

Almost surely, 2^101155493 is an apocalyptic number.

It is an amenable number.

101155493 is a deficient number, since it is larger than the sum of its proper divisors (1).

101155493 is an equidigital number, since it uses as much as digits as its factorization.

101155493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 101155493 is about 10057.6087118161. The cubic root of 101155493 is about 465.9398158259.

The spelling of 101155493 in words is "one hundred one million, one hundred fifty-five thousand, four hundred ninety-three".