100155623 has 2 divisors, whose sum is σ = 100155624. Its totient is φ = 100155622.

The previous prime is 100155617. The next prime is 100155659. The reversal of 100155623 is 326551001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100155623 - 2¹⁶ = 100090087 is a prime.

It is a super-4 number, since 4×100155623⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100155673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50077811 + 50077812.

It is an arithmetic number, because the mean of its divisors is an integer number (50077812).

Almost surely, 2^100155623 is an apocalyptic number.

100155623 is a deficient number, since it is larger than the sum of its proper divisors (1).

100155623 is an equidigital number, since it uses as much as digits as its factorization.

100155623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 100155623 is about 10007.7781250385. The cubic root of 100155623 is about 464.3995378928.

The spelling of 100155623 in words is "one hundred million, one hundred fifty-five thousand, six hundred twenty-three".