101691897 has 8 divisors (see below), whose sum is σ = 136130400. Its totient is φ = 67524000.

The previous prime is 101691851. The next prime is 101691899. The reversal of 101691897 is 798196101.

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

It is not a de Polignac number, because 101691897 - 2⁶ = 101691833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101691899) 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, 66772 + ... + 68277.

It is an arithmetic number, because the mean of its divisors is an integer number (17016300).

Almost surely, 2^101691897 is an apocalyptic number.

It is an amenable number.

101691897 is a deficient number, since it is larger than the sum of its proper divisors (34438503).

101691897 is a wasteful number, since it uses less digits than its factorization.

101691897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135303.

The product of its (nonzero) digits is 27216, while the sum is 42.

The square root of 101691897 is about 10084.2400308600. The cubic root of 101691897 is about 466.7619544083.

The spelling of 101691897 in words is "one hundred one million, six hundred ninety-one thousand, eight hundred ninety-seven".