1622473987 has 2 divisors, whose sum is σ = 1622473988. Its totient is φ = 1622473986.

The previous prime is 1622473969. The next prime is 1622474023. The reversal of 1622473987 is 7893742261.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1622473987 - 2²³ = 1614085379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1622473987.

It is not a weakly prime, because it can be changed into another prime (1622473927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811236993 + 811236994.

It is an arithmetic number, because the mean of its divisors is an integer number (811236994).

Almost surely, 2^1622473987 is an apocalyptic number.

1622473987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1622473987 is an equidigital number, since it uses as much as digits as its factorization.

1622473987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 49.

The square root of 1622473987 is about 40279.9452209161. The cubic root of 1622473987 is about 1175.0578482459.

The spelling of 1622473987 in words is "one billion, six hundred twenty-two million, four hundred seventy-three thousand, nine hundred eighty-seven".