1009969451 has 2 divisors, whose sum is σ = 1009969452. Its totient is φ = 1009969450.

The previous prime is 1009969447. The next prime is 1009969607. The reversal of 1009969451 is 1549699001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1009969451 - 2² = 1009969447 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1009969421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504984725 + 504984726.

It is an arithmetic number, because the mean of its divisors is an integer number (504984726).

Almost surely, 2^1009969451 is an apocalyptic number.

1009969451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009969451 is an equidigital number, since it uses as much as digits as its factorization.

1009969451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 1009969451 is about 31780.0165355527. The cubic root of 1009969451 is about 1003.3121677660.

The spelling of 1009969451 in words is "one billion, nine million, nine hundred sixty-nine thousand, four hundred fifty-one".