402401693 has 2 divisors, whose sum is σ = 402401694. Its totient is φ = 402401692.

The previous prime is 402401683. The next prime is 402401707. The reversal of 402401693 is 396104204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 364122724 + 38278969 = 19082^2 + 6187^2 .

It is a cyclic number.

It is not a de Polignac number, because 402401693 - 2²² = 398207389 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402401683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201200846 + 201200847.

It is an arithmetic number, because the mean of its divisors is an integer number (201200847).

Almost surely, 2^402401693 is an apocalyptic number.

It is an amenable number.

402401693 is a deficient number, since it is larger than the sum of its proper divisors (1).

402401693 is an equidigital number, since it uses as much as digits as its factorization.

402401693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 402401693 is about 20059.9524675409. The cubic root of 402401693 is about 738.2780102594.

Adding to 402401693 its reverse (396104204), we get a palindrome (798505897).

The spelling of 402401693 in words is "four hundred two million, four hundred one thousand, six hundred ninety-three".