101155489 has 2 divisors, whose sum is σ = 101155490. Its totient is φ = 101155488.

The previous prime is 101155463. The next prime is 101155493. The reversal of 101155489 is 984551101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83448225 + 17707264 = 9135^2 + 4208^2 .

It is a cyclic number.

It is not a de Polignac number, because 101155489 - 2⁷ = 101155361 is a prime.

It is not a weakly prime, because it can be changed into another prime (101155459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50577744 + 50577745.

It is an arithmetic number, because the mean of its divisors is an integer number (50577745).

Almost surely, 2^101155489 is an apocalyptic number.

It is an amenable number.

101155489 is a deficient number, since it is larger than the sum of its proper divisors (1).

101155489 is an equidigital number, since it uses as much as digits as its factorization.

101155489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 34.

The square root of 101155489 is about 10057.6085129617. The cubic root of 101155489 is about 465.9398096843.

The spelling of 101155489 in words is "one hundred one million, one hundred fifty-five thousand, four hundred eighty-nine".