154622749 has 2 divisors, whose sum is σ = 154622750. Its totient is φ = 154622748.

The previous prime is 154622717. The next prime is 154622789. The reversal of 154622749 is 947226451.

It is an a-pointer prime, because the next prime (154622789) can be obtained adding 154622749 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154206724 + 416025 = 12418^2 + 645^2 .

It is a cyclic number.

It is not a de Polignac number, because 154622749 - 2⁵ = 154622717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154622789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77311374 + 77311375.

It is an arithmetic number, because the mean of its divisors is an integer number (77311375).

Almost surely, 2^154622749 is an apocalyptic number.

It is an amenable number.

154622749 is a deficient number, since it is larger than the sum of its proper divisors (1).

154622749 is an equidigital number, since it uses as much as digits as its factorization.

154622749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 154622749 is about 12434.7396032245. The cubic root of 154622749 is about 536.7323806641.

The spelling of 154622749 in words is "one hundred fifty-four million, six hundred twenty-two thousand, seven hundred forty-nine".