1400123617 has 2 divisors, whose sum is σ = 1400123618. Its totient is φ = 1400123616.

The previous prime is 1400123581. The next prime is 1400123629. The reversal of 1400123617 is 7163210041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 883516176 + 516607441 = 29724^2 + 22729^2 .

It is a cyclic number.

It is not a de Polignac number, because 1400123617 - 2²⁷ = 1265905889 is a prime.

It is a super-2 number, since 2×1400123617² = 3920692285762325378, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1400123591 and 1400123600.

It is not a weakly prime, because it can be changed into another prime (1400123657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700061808 + 700061809.

It is an arithmetic number, because the mean of its divisors is an integer number (700061809).

Almost surely, 2^1400123617 is an apocalyptic number.

It is an amenable number.

1400123617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400123617 is an equidigital number, since it uses as much as digits as its factorization.

1400123617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 1400123617 is about 37418.2257329233. The cubic root of 1400123617 is about 1118.7218670578.

Adding to 1400123617 its reverse (7163210041), we get a palindrome (8563333658).

The spelling of 1400123617 in words is "one billion, four hundred million, one hundred twenty-three thousand, six hundred seventeen".