101609501 has 4 divisors (see below), whose sum is σ = 116125152. Its totient is φ = 87093852.

The previous prime is 101609491. The next prime is 101609509. The reversal of 101609501 is 105906101.

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 101609501 - 2¹⁰ = 101608477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101609509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7257815 + ... + 7257828.

It is an arithmetic number, because the mean of its divisors is an integer number (29031288).

Almost surely, 2^101609501 is an apocalyptic number.

It is an amenable number.

101609501 is a deficient number, since it is larger than the sum of its proper divisors (14515651).

101609501 is an equidigital number, since it uses as much as digits as its factorization.

101609501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14515650.

The product of its (nonzero) digits is 270, while the sum is 23.

The square root of 101609501 is about 10080.1538182708. The cubic root of 101609501 is about 466.6358555055.

The spelling of 101609501 in words is "one hundred one million, six hundred nine thousand, five hundred one".