1400609653 has 2 divisors, whose sum is σ = 1400609654. Its totient is φ = 1400609652.

The previous prime is 1400609647. The next prime is 1400609677. The reversal of 1400609653 is 3569060041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1149006609 + 251603044 = 33897^2 + 15862^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1400609653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1400609603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700304826 + 700304827.

It is an arithmetic number, because the mean of its divisors is an integer number (700304827).

Almost surely, 2^1400609653 is an apocalyptic number.

It is an amenable number.

1400609653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400609653 is an equidigital number, since it uses as much as digits as its factorization.

1400609653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 1400609653 is about 37424.7198119104. The cubic root of 1400609653 is about 1118.8513023423.

Adding to 1400609653 its reverse (3569060041), we get a palindrome (4969669694).

The spelling of 1400609653 in words is "one billion, four hundred million, six hundred nine thousand, six hundred fifty-three".