154226749 has 2 divisors, whose sum is σ = 154226750. Its totient is φ = 154226748.

The previous prime is 154226747. The next prime is 154226773. The reversal of 154226749 is 947622451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122810724 + 31416025 = 11082^2 + 5605^2 .

It is a cyclic number.

It is not a de Polignac number, because 154226749 - 2¹ = 154226747 is a prime.

Together with 154226747, it forms a pair of twin primes.

It is equal to p_8668543 and since 154226749 and 8668543 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 (154226747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77113374 + 77113375.

It is an arithmetic number, because the mean of its divisors is an integer number (77113375).

Almost surely, 2^154226749 is an apocalyptic number.

It is an amenable number.

154226749 is a deficient number, since it is larger than the sum of its proper divisors (1).

154226749 is an equidigital number, since it uses as much as digits as its factorization.

154226749 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 154226749 is about 12418.8062630834. The cubic root of 154226749 is about 536.2737855106.

The spelling of 154226749 in words is "one hundred fifty-four million, two hundred twenty-six thousand, seven hundred forty-nine".