154640977 has 2 divisors, whose sum is σ = 154640978. Its totient is φ = 154640976.

The previous prime is 154640957. The next prime is 154641043. The reversal of 154640977 is 779046451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79281216 + 75359761 = 8904^2 + 8681^2 .

It is a cyclic number.

It is not a de Polignac number, because 154640977 - 2¹⁹ = 154116689 is a prime.

It is not a weakly prime, because it can be changed into another prime (154640957) 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 as a sum of consecutive naturals, namely, 77320488 + 77320489.

It is an arithmetic number, because the mean of its divisors is an integer number (77320489).

Almost surely, 2^154640977 is an apocalyptic number.

It is an amenable number.

154640977 is a deficient number, since it is larger than the sum of its proper divisors (1).

154640977 is an equidigital number, since it uses as much as digits as its factorization.

154640977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 154640977 is about 12435.4725282154. The cubic root of 154640977 is about 536.7534710782.

The spelling of 154640977 in words is "one hundred fifty-four million, six hundred forty thousand, nine hundred seventy-seven".