102001691 has 8 divisors (see below), whose sum is σ = 111599424. Its totient is φ = 92458120.

The previous prime is 102001681. The next prime is 102001693. The reversal of 102001691 is 196100201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102001691 - 2²⁶ = 34892827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102001693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9545 + ... + 17178.

It is an arithmetic number, because the mean of its divisors is an integer number (13949928).

Almost surely, 2^102001691 is an apocalyptic number.

102001691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

102001691 is a deficient number, since it is larger than the sum of its proper divisors (9597733).

102001691 is a wasteful number, since it uses less digits than its factorization.

102001691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27081.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 102001691 is about 10099.5886549899. The cubic root of 102001691 is about 467.2354548173.

Adding to 102001691 its reverse (196100201), we get a palindrome (298101892).

The spelling of 102001691 in words is "one hundred two million, one thousand, six hundred ninety-one".