191497001 has 4 divisors (see below), whose sum is σ = 192203904. Its totient is φ = 190790100.

The previous prime is 191496997. The next prime is 191497037. The reversal of 191497001 is 100794191.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 100794191 = 89 ⋅1132519.

It is a cyclic number.

It is not a de Polignac number, because 191497001 - 2² = 191496997 is a prime.

It is a super-2 number, since 2×191497001² = 73342202783988002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191497301) 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, 353045 + ... + 353586.

It is an arithmetic number, because the mean of its divisors is an integer number (48050976).

Almost surely, 2^191497001 is an apocalyptic number.

It is an amenable number.

191497001 is a deficient number, since it is larger than the sum of its proper divisors (706903).

191497001 is an equidigital number, since it uses as much as digits as its factorization.

191497001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706902.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 191497001 is about 13838.2441443992. The cubic root of 191497001 is about 576.3956027595.

The spelling of 191497001 in words is "one hundred ninety-one million, four hundred ninety-seven thousand, one".