420729087 has 16 divisors (see below), whose sum is σ = 586874880. Its totient is φ = 267597792.

The previous prime is 420729083. The next prime is 420729091. The reversal of 420729087 is 780927024.

It is an interprime number because it is at equal distance from previous prime (420729083) and next prime (420729091).

It is not a de Polignac number, because 420729087 - 2² = 420729083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420729083) 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 in 15 ways as a sum of consecutive naturals, for example, 19714 + ... + 35072.

It is an arithmetic number, because the mean of its divisors is an integer number (36679680).

Almost surely, 2^420729087 is an apocalyptic number.

420729087 is a deficient number, since it is larger than the sum of its proper divisors (166145793).

420729087 is a wasteful number, since it uses less digits than its factorization.

420729087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15782.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 420729087 is about 20511.6817204246. The cubic root of 420729087 is about 749.3203246858.

The spelling of 420729087 in words is "four hundred twenty million, seven hundred twenty-nine thousand, eighty-seven".