100451947 has 2 divisors, whose sum is σ = 100451948. Its totient is φ = 100451946.

The previous prime is 100451941. The next prime is 100451959. The reversal of 100451947 is 749154001.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100451947 is a prime.

It is not a weakly prime, because it can be changed into another prime (100451941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50225973 + 50225974.

It is an arithmetic number, because the mean of its divisors is an integer number (50225974).

Almost surely, 2^100451947 is an apocalyptic number.

100451947 is a deficient number, since it is larger than the sum of its proper divisors (1).

100451947 is an equidigital number, since it uses as much as digits as its factorization.

100451947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 100451947 is about 10022.5718755218. The cubic root of 100451947 is about 464.8570833002.

The spelling of 100451947 in words is "one hundred million, four hundred fifty-one thousand, nine hundred forty-seven".