150640981 has 2 divisors, whose sum is σ = 150640982. Its totient is φ = 150640980.

The previous prime is 150640979. The next prime is 150641003. The reversal of 150640981 is 189046051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149670756 + 970225 = 12234^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 150640981 - 2¹ = 150640979 is a prime.

It is a super-2 number, since 2×150640981² = 45385410313284722, which contains 22 as substring.

Together with 150640979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (150640901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75320490 + 75320491.

It is an arithmetic number, because the mean of its divisors is an integer number (75320491).

Almost surely, 2^150640981 is an apocalyptic number.

It is an amenable number.

150640981 is a deficient number, since it is larger than the sum of its proper divisors (1).

150640981 is an equidigital number, since it uses as much as digits as its factorization.

150640981 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 34.

The square root of 150640981 is about 12273.5887579795. The cubic root of 150640981 is about 532.0850357315.

The spelling of 150640981 in words is "one hundred fifty million, six hundred forty thousand, nine hundred eighty-one".