154129961 has 2 divisors, whose sum is σ = 154129962. Its totient is φ = 154129960.

The previous prime is 154129907. The next prime is 154129979. The reversal of 154129961 is 169921451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152374336 + 1755625 = 12344^2 + 1325^2 .

It is a cyclic number.

It is not a de Polignac number, because 154129961 - 2⁶ = 154129897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (154129991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77064980 + 77064981.

It is an arithmetic number, because the mean of its divisors is an integer number (77064981).

Almost surely, 2^154129961 is an apocalyptic number.

It is an amenable number.

154129961 is a deficient number, since it is larger than the sum of its proper divisors (1).

154129961 is an equidigital number, since it uses as much as digits as its factorization.

154129961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 38.

The square root of 154129961 is about 12414.9088196410. The cubic root of 154129961 is about 536.1615790155.

The spelling of 154129961 in words is "one hundred fifty-four million, one hundred twenty-nine thousand, nine hundred sixty-one".