451989049 has 2 divisors, whose sum is σ = 451989050. Its totient is φ = 451989048.

The previous prime is 451989023. The next prime is 451989067. The reversal of 451989049 is 940989154.

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., 448592400 + 3396649 = 21180^2 + 1843^2 .

It is a cyclic number.

It is not a de Polignac number, because 451989049 - 2¹³ = 451980857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 451988993 and 451989011.

It is not a weakly prime, because it can be changed into another prime (451989089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225994524 + 225994525.

It is an arithmetic number, because the mean of its divisors is an integer number (225994525).

Almost surely, 2^451989049 is an apocalyptic number.

It is an amenable number.

451989049 is a deficient number, since it is larger than the sum of its proper divisors (1).

451989049 is an equidigital number, since it uses as much as digits as its factorization.

451989049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 451989049 is about 21260.0340780536. The cubic root of 451989049 is about 767.4368299927.

The spelling of 451989049 in words is "four hundred fifty-one million, nine hundred eighty-nine thousand, forty-nine".