1455965989 has 2 divisors, whose sum is σ = 1455965990. Its totient is φ = 1455965988.

The previous prime is 1455965981. The next prime is 1455966007. The reversal of 1455965989 is 9895695541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1182328225 + 273637764 = 34385^2 + 16542^2 .

It is a cyclic number.

It is not a de Polignac number, because 1455965989 - 2³ = 1455965981 is a prime.

It is a super-2 number, since 2×1455965989² = 4239673922249496242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1455965981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 727982994 + 727982995.

It is an arithmetic number, because the mean of its divisors is an integer number (727982995).

Almost surely, 2^1455965989 is an apocalyptic number.

It is an amenable number.

1455965989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1455965989 is an equidigital number, since it uses as much as digits as its factorization.

1455965989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496000, while the sum is 61.

The square root of 1455965989 is about 38157.1223888804. The cubic root of 1455965989 is about 1133.4013963641.

The spelling of 1455965989 in words is "one billion, four hundred fifty-five million, nine hundred sixty-five thousand, nine hundred eighty-nine".