154719491 has 2 divisors, whose sum is σ = 154719492. Its totient is φ = 154719490.

The previous prime is 154719479. The next prime is 154719517. The reversal of 154719491 is 194917451.

It is a weak prime.

It is an emirp because it is prime and its reverse (194917451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154719491 - 2⁶ = 154719427 is a prime.

It is not a weakly prime, because it can be changed into another prime (154719391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77359745 + 77359746.

It is an arithmetic number, because the mean of its divisors is an integer number (77359746).

Almost surely, 2^154719491 is an apocalyptic number.

154719491 is a deficient number, since it is larger than the sum of its proper divisors (1).

154719491 is an equidigital number, since it uses as much as digits as its factorization.

154719491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 41.

The square root of 154719491 is about 12438.6289839355. The cubic root of 154719491 is about 536.8442954997.

The spelling of 154719491 in words is "one hundred fifty-four million, seven hundred nineteen thousand, four hundred ninety-one".