401263789 has 2 divisors, whose sum is σ = 401263790. Its totient is φ = 401263788.

The previous prime is 401263777. The next prime is 401263829. The reversal of 401263789 is 987362104.

It is an a-pointer prime, because the next prime (401263829) can be obtained adding 401263789 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 318908164 + 82355625 = 17858^2 + 9075^2 .

It is a cyclic number.

It is not a de Polignac number, because 401263789 - 2⁹ = 401263277 is a prime.

It is a super-2 number, since 2×401263789² = 322025256725273042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401263729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200631894 + 200631895.

It is an arithmetic number, because the mean of its divisors is an integer number (200631895).

Almost surely, 2^401263789 is an apocalyptic number.

It is an amenable number.

401263789 is a deficient number, since it is larger than the sum of its proper divisors (1).

401263789 is an equidigital number, since it uses as much as digits as its factorization.

401263789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 401263789 is about 20031.5698086795. The cubic root of 401263789 is about 737.5814570182.

The spelling of 401263789 in words is "four hundred one million, two hundred sixty-three thousand, seven hundred eighty-nine".