101772609 has 4 divisors (see below), whose sum is σ = 135696816. Its totient is φ = 67848404.

The previous prime is 101772589. The next prime is 101772617. The reversal of 101772609 is 906277101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 101772609 - 2⁵ = 101772577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101772609.

It is not an unprimeable number, because it can be changed into a prime (101772679) 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 in 3 ways as a sum of consecutive naturals, for example, 16962099 + ... + 16962104.

It is an arithmetic number, because the mean of its divisors is an integer number (33924204).

Almost surely, 2^101772609 is an apocalyptic number.

It is an amenable number.

101772609 is a deficient number, since it is larger than the sum of its proper divisors (33924207).

101772609 is an equidigital number, since it uses as much as digits as its factorization.

101772609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33924206.

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 101772609 is about 10088.2411251912. The cubic root of 101772609 is about 466.8854100928.

The spelling of 101772609 in words is "one hundred one million, seven hundred seventy-two thousand, six hundred nine".