101649533 has 2 divisors, whose sum is σ = 101649534. Its totient is φ = 101649532.

The previous prime is 101649529. The next prime is 101649539. The reversal of 101649533 is 335946101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101646724 + 2809 = 10082^2 + 53^2 .

It is a cyclic number.

It is not a de Polignac number, because 101649533 - 2² = 101649529 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 101649533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101649539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50824766 + 50824767.

It is an arithmetic number, because the mean of its divisors is an integer number (50824767).

Almost surely, 2^101649533 is an apocalyptic number.

It is an amenable number.

101649533 is a deficient number, since it is larger than the sum of its proper divisors (1).

101649533 is an equidigital number, since it uses as much as digits as its factorization.

101649533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 101649533 is about 10082.1393067146. The cubic root of 101649533 is about 466.6971290206.

It can be divided in two parts, 1016 and 49533, that multiplied together give a triangular number (50325528 = T₁₀₀₃₂).

The spelling of 101649533 in words is "one hundred one million, six hundred forty-nine thousand, five hundred thirty-three".