400127617 has 2 divisors, whose sum is σ = 400127618. Its totient is φ = 400127616.

The previous prime is 400127603. The next prime is 400127659. The reversal of 400127617 is 716721004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400040001 + 87616 = 20001^2 + 296^2 .

It is a cyclic number.

It is not a de Polignac number, because 400127617 - 2⁷ = 400127489 is a prime.

It is not a weakly prime, because it can be changed into another prime (400197617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200063808 + 200063809.

It is an arithmetic number, because the mean of its divisors is an integer number (200063809).

Almost surely, 2^400127617 is an apocalyptic number.

It is an amenable number.

400127617 is a deficient number, since it is larger than the sum of its proper divisors (1).

400127617 is an equidigital number, since it uses as much as digits as its factorization.

400127617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 400127617 is about 20003.1901705703. The cubic root of 400127617 is about 736.8846489044.

The spelling of 400127617 in words is "four hundred million, one hundred twenty-seven thousand, six hundred seventeen".