1400643229 has 2 divisors, whose sum is σ = 1400643230. Its totient is φ = 1400643228.

The previous prime is 1400643203. The next prime is 1400643239. The reversal of 1400643229 is 9223460041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1001722500 + 398920729 = 31650^2 + 19973^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1400643229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1400643229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1400643239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700321614 + 700321615.

It is an arithmetic number, because the mean of its divisors is an integer number (700321615).

Almost surely, 2^1400643229 is an apocalyptic number.

It is an amenable number.

1400643229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400643229 is an equidigital number, since it uses as much as digits as its factorization.

1400643229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1400643229 is about 37425.1683897347. The cubic root of 1400643229 is about 1118.8602427945.

The spelling of 1400643229 in words is "one billion, four hundred million, six hundred forty-three thousand, two hundred twenty-nine".