487987470721 has 27 divisors (see below), whose sum is σ = 507293763139. Its totient is φ = 469410638048.

The previous prime is 487987470701. The next prime is 487987470739. The reversal of 487987470721 is 127074789784.

The square root of 487987470721 is 698561.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 93703944321 + 394283526400 = 306111^2 + 627920^2 .

It is not a de Polignac number, because 487987470721 - 2⁹ = 487987470209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (487987470701) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2922080580 + ... + 2922080746.

Almost surely, 2^487987470721 is an apocalyptic number.

487987470721 is the 698561-st square number.

487987470721 is the 349281-st centered octagonal number.

It is an amenable number.

487987470721 is a deficient number, since it is larger than the sum of its proper divisors (19306292418).

487987470721 is an frugal number, since it uses more digits than its factorization.

With its predecessor (487987470720) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (303).

487987470721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 44255232, while the sum is 64.

Multiplying 487987470721 by its sum of digits (64), we get a square (31231198126144 = 5588488²).

The spelling of 487987470721 in words is "four hundred eighty-seven billion, nine hundred eighty-seven million, four hundred seventy thousand, seven hundred twenty-one".