191901696 has 208 divisors, whose sum is σ = 616487424. Its totient is φ = 51904512.

The previous prime is 191901679. The next prime is 191901701. The reversal of 191901696 is 696109191.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1978320 + ... + 1978416.

Almost surely, 2^191901696 is an apocalyptic number.

191901696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191901696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308243712).

191901696 is an abundant number, since it is smaller than the sum of its proper divisors (424585728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191901696 is an equidigital number, since it uses as much as digits as its factorization.

191901696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 42.

The square root of 191901696 is about 13852.8587663341. The cubic root of 191901696 is about 576.8013537441.

The spelling of 191901696 in words is "one hundred ninety-one million, nine hundred one thousand, six hundred ninety-six".