1234621987 has 2 divisors, whose sum is σ = 1234621988. Its totient is φ = 1234621986.

The previous prime is 1234621981. The next prime is 1234622009. The reversal of 1234621987 is 7891264321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1234621987 - 2⁷ = 1234621859 is a prime.

It is not a weakly prime, because it can be changed into another prime (1234621981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617310993 + 617310994.

It is an arithmetic number, because the mean of its divisors is an integer number (617310994).

Almost surely, 2^1234621987 is an apocalyptic number.

1234621987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1234621987 is an equidigital number, since it uses as much as digits as its factorization.

1234621987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 1234621987 is about 35137.1880918209. The cubic root of 1234621987 is about 1072.7816484361.

The spelling of 1234621987 in words is "one billion, two hundred thirty-four million, six hundred twenty-one thousand, nine hundred eighty-seven".