2617447921 has 9 divisors (see below), whose sum is σ = 2877648249. Its totient is φ = 2378986500.

The previous prime is 2617447919. The next prime is 2617447927. The reversal of 2617447921 is 1297447162.

The square root of 2617447921 is 51161.

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

It is not a de Polignac number, because 2617447921 - 2¹ = 2617447919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2617447927) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 560446 + ... + 565096.

Almost surely, 2^2617447921 is an apocalyptic number.

2617447921 is the 51161-st square number.

2617447921 is the 25581-st centered octagonal number.

It is an amenable number.

2617447921 is a deficient number, since it is larger than the sum of its proper divisors (260200328).

2617447921 is an frugal number, since it uses more digits than its factorization.

2617447921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9324 (or 4662 counting only the distinct ones).

The product of its digits is 169344, while the sum is 43.

The cubic root of 2617447921 is about 1378.1379214246.

The spelling of 2617447921 in words is "two billion, six hundred seventeen million, four hundred forty-seven thousand, nine hundred twenty-one".