402207093661 has 2 divisors, whose sum is σ = 402207093662. Its totient is φ = 402207093660.

The previous prime is 402207093641. The next prime is 402207093713. The reversal of 402207093661 is 166390702204.

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., 392509768036 + 9697325625 = 626506^2 + 98475^2 .

It is a cyclic number.

It is not a de Polignac number, because 402207093661 - 2³³ = 393617159069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402207093641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201103546830 + 201103546831.

It is an arithmetic number, because the mean of its divisors is an integer number (201103546831).

Almost surely, 2^402207093661 is an apocalyptic number.

It is an amenable number.

402207093661 is a deficient number, since it is larger than the sum of its proper divisors (1).

402207093661 is an equidigital number, since it uses as much as digits as its factorization.

402207093661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 40.

Adding to 402207093661 its reverse (166390702204), we get a palindrome (568597795865).

The spelling of 402207093661 in words is "four hundred two billion, two hundred seven million, ninety-three thousand, six hundred sixty-one".