1406455789 has 2 divisors, whose sum is σ = 1406455790. Its totient is φ = 1406455788.

The previous prime is 1406455763. The next prime is 1406455811. The reversal of 1406455789 is 9875546041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1193149764 + 213306025 = 34542^2 + 14605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1406455789 is a prime.

It is a super-2 number, since 2×1406455789² = 3956235772823225042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1406455189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703227894 + 703227895.

It is an arithmetic number, because the mean of its divisors is an integer number (703227895).

Almost surely, 2^1406455789 is an apocalyptic number.

It is an amenable number.

1406455789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406455789 is an equidigital number, since it uses as much as digits as its factorization.

1406455789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The square root of 1406455789 is about 37502.7437529576. The cubic root of 1406455789 is about 1120.4058342730.

The spelling of 1406455789 in words is "one billion, four hundred six million, four hundred fifty-five thousand, seven hundred eighty-nine".