151191997 has 8 divisors (see below), whose sum is σ = 168446592. Its totient is φ = 134522400.

The previous prime is 151191923. The next prime is 151192003. The reversal of 151191997 is 799191151.

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 151191997 - 2¹¹ = 151189949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151197997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145704 + ... + 146737.

It is an arithmetic number, because the mean of its divisors is an integer number (21055824).

Almost surely, 2^151191997 is an apocalyptic number.

It is an amenable number.

151191997 is a deficient number, since it is larger than the sum of its proper divisors (17254595).

151191997 is a wasteful number, since it uses less digits than its factorization.

151191997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292499.

The product of its digits is 25515, while the sum is 43.

The square root of 151191997 is about 12296.0154928334. The cubic root of 151191997 is about 532.7330015467.

The spelling of 151191997 in words is "one hundred fifty-one million, one hundred ninety-one thousand, nine hundred ninety-seven".