1333640401 has 2 divisors, whose sum is σ = 1333640402. Its totient is φ = 1333640400.

The previous prime is 1333640393. The next prime is 1333640423. The reversal of 1333640401 is 1040463331.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 937829376 + 395811025 = 30624^2 + 19895^2 .

It is an emirp because it is prime and its reverse (1040463331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1333640401 - 2³ = 1333640393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1333640471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 666820200 + 666820201.

It is an arithmetic number, because the mean of its divisors is an integer number (666820201).

Almost surely, 2^1333640401 is an apocalyptic number.

It is an amenable number.

1333640401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1333640401 is an equidigital number, since it uses as much as digits as its factorization.

1333640401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 1333640401 is about 36519.0416221456. The cubic root of 1333640401 is about 1100.7269027374.

The spelling of 1333640401 in words is "one billion, three hundred thirty-three million, six hundred forty thousand, four hundred one".