1455657989 has 2 divisors, whose sum is σ = 1455657990. Its totient is φ = 1455657988.

The previous prime is 1455657949. The next prime is 1455658021. The reversal of 1455657989 is 9897565541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1053976225 + 401681764 = 32465^2 + 20042^2 .

It is a cyclic number.

It is not a de Polignac number, because 1455657989 - 2¹² = 1455653893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1455657919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 727828994 + 727828995.

It is an arithmetic number, because the mean of its divisors is an integer number (727828995).

Almost surely, 2^1455657989 is an apocalyptic number.

It is an amenable number.

1455657989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1455657989 is an equidigital number, since it uses as much as digits as its factorization.

1455657989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608000, while the sum is 59.

The square root of 1455657989 is about 38153.0862316537. The cubic root of 1455657989 is about 1133.3214695317.

The spelling of 1455657989 in words is "one billion, four hundred fifty-five million, six hundred fifty-seven thousand, nine hundred eighty-nine".