151968961 has 4 divisors (see below), whose sum is σ = 157209300. Its totient is φ = 146728624.

The previous prime is 151968917. The next prime is 151968979. The reversal of 151968961 is 169869151.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 98386561 + 53582400 = 9919^2 + 7320^2 .

It is a cyclic number.

It is not a de Polignac number, because 151968961 - 2¹³ = 151960769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151968911) 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 3 ways as a sum of consecutive naturals, for example, 2620126 + ... + 2620183.

It is an arithmetic number, because the mean of its divisors is an integer number (39302325).

Almost surely, 2^151968961 is an apocalyptic number.

It is an amenable number.

151968961 is a deficient number, since it is larger than the sum of its proper divisors (5240339).

151968961 is an equidigital number, since it uses as much as digits as its factorization.

151968961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5240338.

The product of its digits is 116640, while the sum is 46.

The square root of 151968961 is about 12327.5691439959. The cubic root of 151968961 is about 533.6440007281.

The spelling of 151968961 in words is "one hundred fifty-one million, nine hundred sixty-eight thousand, nine hundred sixty-one".