1400424209 has 2 divisors, whose sum is σ = 1400424210. Its totient is φ = 1400424208.

The previous prime is 1400424197. The next prime is 1400424217. The reversal of 1400424209 is 9024240041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 701985025 + 698439184 = 26495^2 + 26428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1400424209 is a prime.

It is a super-2 number, since 2×1400424209² = 3922375930306551362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1400424409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700212104 + 700212105.

It is an arithmetic number, because the mean of its divisors is an integer number (700212105).

Almost surely, 2^1400424209 is an apocalyptic number.

It is an amenable number.

1400424209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400424209 is an equidigital number, since it uses as much as digits as its factorization.

1400424209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 1400424209 is about 37422.2421695975. The cubic root of 1400424209 is about 1118.8019206514.

The spelling of 1400424209 in words is "one billion, four hundred million, four hundred twenty-four thousand, two hundred nine".