100451987 has 2 divisors, whose sum is σ = 100451988. Its totient is φ = 100451986.

The previous prime is 100451977. The next prime is 100452041. The reversal of 100451987 is 789154001.

It is a weak prime.

It is an emirp because it is prime and its reverse (789154001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100451987 - 2¹² = 100447891 is a prime.

It is not a weakly prime, because it can be changed into another prime (100451947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50225993 + 50225994.

It is an arithmetic number, because the mean of its divisors is an integer number (50225994).

Almost surely, 2^100451987 is an apocalyptic number.

100451987 is a deficient number, since it is larger than the sum of its proper divisors (1).

100451987 is an equidigital number, since it uses as much as digits as its factorization.

100451987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 100451987 is about 10022.5738710174. The cubic root of 100451987 is about 464.8571450023.

The spelling of 100451987 in words is "one hundred million, four hundred fifty-one thousand, nine hundred eighty-seven".