100155493 has 2 divisors, whose sum is σ = 100155494. Its totient is φ = 100155492.

The previous prime is 100155487. The next prime is 100155521. The reversal of 100155493 is 394551001.

It is an a-pointer prime, because the next prime (100155521) can be obtained adding 100155493 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72624484 + 27531009 = 8522^2 + 5247^2 .

It is a cyclic number.

It is not a de Polignac number, because 100155493 - 2⁹ = 100154981 is a prime.

It is a super-2 number, since 2×100155493² = 20062245556146098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100155443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50077746 + 50077747.

It is an arithmetic number, because the mean of its divisors is an integer number (50077747).

Almost surely, 2^100155493 is an apocalyptic number.

It is an amenable number.

100155493 is a deficient number, since it is larger than the sum of its proper divisors (1).

100155493 is an equidigital number, since it uses as much as digits as its factorization.

100155493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 100155493 is about 10007.7716300883. The cubic root of 100155493 is about 464.3993369656.

The spelling of 100155493 in words is "one hundred million, one hundred fifty-five thousand, four hundred ninety-three".