401550749 has 2 divisors, whose sum is σ = 401550750. Its totient is φ = 401550748.

The previous prime is 401550703. The next prime is 401550817. The reversal of 401550749 is 947055104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245925124 + 155625625 = 15682^2 + 12475^2 .

It is a cyclic number.

It is not a de Polignac number, because 401550749 - 2²⁰ = 400502173 is a prime.

It is a super-2 number, since 2×401550749² = 322486008044922002, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401550049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200775374 + 200775375.

It is an arithmetic number, because the mean of its divisors is an integer number (200775375).

Almost surely, 2^401550749 is an apocalyptic number.

It is an amenable number.

401550749 is a deficient number, since it is larger than the sum of its proper divisors (1).

401550749 is an equidigital number, since it uses as much as digits as its factorization.

401550749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 401550749 is about 20038.7312223105. The cubic root of 401550749 is about 737.7572399205.

The spelling of 401550749 in words is "four hundred one million, five hundred fifty thousand, seven hundred forty-nine".