151091909 has 2 divisors, whose sum is σ = 151091910. Its totient is φ = 151091908.

The previous prime is 151091873. The next prime is 151091911. The reversal of 151091909 is 909190151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76615009 + 74476900 = 8753^2 + 8630^2 .

It is a cyclic number.

It is not a de Polignac number, because 151091909 - 2¹² = 151087813 is a prime.

Together with 151091911, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151091999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75545954 + 75545955.

It is an arithmetic number, because the mean of its divisors is an integer number (75545955).

Almost surely, 2^151091909 is an apocalyptic number.

It is an amenable number.

151091909 is a deficient number, since it is larger than the sum of its proper divisors (1).

151091909 is an equidigital number, since it uses as much as digits as its factorization.

151091909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3645, while the sum is 35.

The square root of 151091909 is about 12291.9448827271. The cubic root of 151091909 is about 532.6154204757.

The spelling of 151091909 in words is "one hundred fifty-one million, ninety-one thousand, nine hundred nine".