154691651 has 4 divisors (see below), whose sum is σ = 155730000. Its totient is φ = 153653304.

The previous prime is 154691639. The next prime is 154691659. The reversal of 154691651 is 156196451.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154691651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154691659) 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 3 ways as a sum of consecutive naturals, for example, 518951 + ... + 519248.

It is an arithmetic number, because the mean of its divisors is an integer number (38932500).

Almost surely, 2^154691651 is an apocalyptic number.

154691651 is a deficient number, since it is larger than the sum of its proper divisors (1038349).

154691651 is a wasteful number, since it uses less digits than its factorization.

154691651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038348.

The product of its digits is 32400, while the sum is 38.

The square root of 154691651 is about 12437.5098391921. The cubic root of 154691651 is about 536.8120939078.

The spelling of 154691651 in words is "one hundred fifty-four million, six hundred ninety-one thousand, six hundred fifty-one".