154139717 has 2 divisors, whose sum is σ = 154139718. Its totient is φ = 154139716.

The previous prime is 154139707. The next prime is 154139771. The reversal of 154139717 is 717931451.

Together with next prime (154139771) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106791556 + 47348161 = 10334^2 + 6881^2 .

It is a cyclic number.

It is not a de Polignac number, because 154139717 - 2⁴ = 154139701 is a prime.

It is equal to p_8663933 and since 154139717 and 8663933 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154139707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77069858 + 77069859.

It is an arithmetic number, because the mean of its divisors is an integer number (77069859).

Almost surely, 2^154139717 is an apocalyptic number.

It is an amenable number.

154139717 is a deficient number, since it is larger than the sum of its proper divisors (1).

154139717 is an equidigital number, since it uses as much as digits as its factorization.

154139717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 38.

The square root of 154139717 is about 12415.3017281096. The cubic root of 154139717 is about 536.1728912915.

The spelling of 154139717 in words is "one hundred fifty-four million, one hundred thirty-nine thousand, seven hundred seventeen".