151697691 has 40 divisors (see below), whose sum is σ = 240112400. Its totient is φ = 95178240.

The previous prime is 151697687. The next prime is 151697699. The reversal of 151697691 is 196796151.

It is not a de Polignac number, because 151697691 - 2² = 151697687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151697699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 370695 + ... + 371103.

It is an arithmetic number, because the mean of its divisors is an integer number (6002810).

Almost surely, 2^151697691 is an apocalyptic number.

151697691 is a deficient number, since it is larger than the sum of its proper divisors (88414709).

151697691 is a wasteful number, since it uses less digits than its factorization.

151697691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681 (or 672 counting only the distinct ones).

The product of its digits is 102060, while the sum is 45.

The square root of 151697691 is about 12316.5616549425. The cubic root of 151697691 is about 533.3262871031.

The spelling of 151697691 in words is "one hundred fifty-one million, six hundred ninety-seven thousand, six hundred ninety-one".