191097748 has 48 divisors (see below), whose sum is σ = 366799104. Its totient is φ = 86745600.

The previous prime is 191097743. The next prime is 191097773. The reversal of 191097748 is 847790191.

It is a junction number, because it is equal to n+sod(n) for n = 191097698 and 191097707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191097743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379665 + ... + 380167.

It is an arithmetic number, because the mean of its divisors is an integer number (7641648).

Almost surely, 2^191097748 is an apocalyptic number.

It is an amenable number.

191097748 is a deficient number, since it is larger than the sum of its proper divisors (175701356).

191097748 is a wasteful number, since it uses less digits than its factorization.

191097748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712 (or 710 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 46.

The square root of 191097748 is about 13823.8109072716. The cubic root of 191097748 is about 575.9947474122.

The spelling of 191097748 in words is "one hundred ninety-one million, ninety-seven thousand, seven hundred forty-eight".