39420117025 has 9 divisors (see below), whose sum is σ = 48882176121. Its totient is φ = 31535299440.

The previous prime is 39420116999. The next prime is 39420117031. The reversal of 39420117025 is 52071102493.

It is a happy number.

The square root of 39420117025 is 198545.

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

It can be written as a sum of positive squares in 4 ways, for example, as 4415203809 + 35004913216 = 66447^2 + 187096^2 .

It is not a de Polignac number, because 39420117025 - 2¹⁷ = 39419985953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 972871 + ... + 1012579.

Almost surely, 2^39420117025 is an apocalyptic number.

39420117025 is the 198545-th square number.

39420117025 is the 99273-rd centered octagonal number.

It is an amenable number.

39420117025 is a deficient number, since it is larger than the sum of its proper divisors (9462059096).

39420117025 is an frugal number, since it uses more digits than its factorization.

39420117025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79428 (or 39714 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 39420117025 in words is "thirty-nine billion, four hundred twenty million, one hundred seventeen thousand, twenty-five".