154131493 has 2 divisors, whose sum is σ = 154131494. Its totient is φ = 154131492.

The previous prime is 154131463. The next prime is 154131539. The reversal of 154131493 is 394131451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141300769 + 12830724 = 11887^2 + 3582^2 .

It is a cyclic number.

It is not a de Polignac number, because 154131493 - 2¹³ = 154123301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154131443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77065746 + 77065747.

It is an arithmetic number, because the mean of its divisors is an integer number (77065747).

Almost surely, 2^154131493 is an apocalyptic number.

It is an amenable number.

154131493 is a deficient number, since it is larger than the sum of its proper divisors (1).

154131493 is an equidigital number, since it uses as much as digits as its factorization.

154131493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 31.

The square root of 154131493 is about 12414.9705194978. The cubic root of 154131493 is about 536.1633554315.

The spelling of 154131493 in words is "one hundred fifty-four million, one hundred thirty-one thousand, four hundred ninety-three".