1400669 has 2 divisors, whose sum is σ = 1400670. Its totient is φ = 1400668.

The previous prime is 1400653. The next prime is 1400687. The reversal of 1400669 is 9660041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1295044 + 105625 = 1138^2 + 325^2 .

It is a cyclic number.

It is not a de Polignac number, because 1400669 - 2⁴ = 1400653 is a prime.

It is a super-2 number, since 2×1400669² = 3923747295122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen 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 (1400689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700334 + 700335.

It is an arithmetic number, because the mean of its divisors is an integer number (700335).

2^1400669 is an apocalyptic number.

It is an amenable number.

1400669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400669 is an equidigital number, since it uses as much as digits as its factorization.

1400669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1400669 is about 1183.4986269532. The cubic root of 1400669 is about 111.8867104873.

The spelling of 1400669 in words is "one million, four hundred thousand, six hundred sixty-nine".