151668749 has 2 divisors, whose sum is σ = 151668750. Its totient is φ = 151668748.

The previous prime is 151668743. The next prime is 151668817. The reversal of 151668749 is 947866151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94439524 + 57229225 = 9718^2 + 7565^2 .

It is a cyclic number.

It is not a de Polignac number, because 151668749 - 2⁴ = 151668733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151668743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75834374 + 75834375.

It is an arithmetic number, because the mean of its divisors is an integer number (75834375).

Almost surely, 2^151668749 is an apocalyptic number.

It is an amenable number.

151668749 is a deficient number, since it is larger than the sum of its proper divisors (1).

151668749 is an equidigital number, since it uses as much as digits as its factorization.

151668749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 47.

The square root of 151668749 is about 12315.3866768364. The cubic root of 151668749 is about 533.2923676434.

The spelling of 151668749 in words is "one hundred fifty-one million, six hundred sixty-eight thousand, seven hundred forty-nine".