620487291 has 16 divisors (see below), whose sum is σ = 849728000. Its totient is φ = 402524640.

The previous prime is 620487281. The next prime is 620487293. The reversal of 620487291 is 192784026.

It is not a de Polignac number, because 620487291 - 2¹⁰ = 620486267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620487293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26085 + ... + 43833.

It is an arithmetic number, because the mean of its divisors is an integer number (53108000).

Almost surely, 2^620487291 is an apocalyptic number.

620487291 is a deficient number, since it is larger than the sum of its proper divisors (229240709).

620487291 is a wasteful number, since it uses less digits than its factorization.

620487291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18066.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 620487291 is about 24909.5823128370. The cubic root of 620487291 is about 852.9252344303.

The spelling of 620487291 in words is "six hundred twenty million, four hundred eighty-seven thousand, two hundred ninety-one".