151640891 has 2 divisors, whose sum is σ = 151640892. Its totient is φ = 151640890.

The previous prime is 151640873. The next prime is 151640903. The reversal of 151640891 is 198046151.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 151640891 - 2¹⁰ = 151639867 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (151640831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75820445 + 75820446.

It is an arithmetic number, because the mean of its divisors is an integer number (75820446).

Almost surely, 2^151640891 is an apocalyptic number.

151640891 is a deficient number, since it is larger than the sum of its proper divisors (1).

151640891 is an equidigital number, since it uses as much as digits as its factorization.

151640891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 151640891 is about 12314.2556007255. The cubic root of 151640891 is about 533.2597145347.

The spelling of 151640891 in words is "one hundred fifty-one million, six hundred forty thousand, eight hundred ninety-one".