987212407 has 2 divisors, whose sum is σ = 987212408. Its totient is φ = 987212406.

The previous prime is 987212383. The next prime is 987212411. The reversal of 987212407 is 704212789.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-987212407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 987212407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (987212437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493606203 + 493606204.

It is an arithmetic number, because the mean of its divisors is an integer number (493606204).

Almost surely, 2^987212407 is an apocalyptic number.

987212407 is a deficient number, since it is larger than the sum of its proper divisors (1).

987212407 is an equidigital number, since it uses as much as digits as its factorization.

987212407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 987212407 is about 31419.9364576060. The cubic root of 987212407 is about 995.7191696409.

The spelling of 987212407 in words is "nine hundred eighty-seven million, two hundred twelve thousand, four hundred seven".