32920972409 has 4 divisors (see below), whose sum is σ = 35453354916. Its totient is φ = 30388589904.

The previous prime is 32920972363. The next prime is 32920972457. The reversal of 32920972409 is 90427902923.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90427902923 = 38011 ⋅2378993.

It can be written as a sum of positive squares in 2 ways, for example, as 8348842384 + 24572130025 = 91372^2 + 156755^2 .

It is a cyclic number.

It is not a de Polignac number, because 32920972409 - 2¹² = 32920968313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32920972489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1266191234 + ... + 1266191259.

It is an arithmetic number, because the mean of its divisors is an integer number (8863338729).

Almost surely, 2^32920972409 is an apocalyptic number.

It is an amenable number.

32920972409 is a deficient number, since it is larger than the sum of its proper divisors (2532382507).

32920972409 is a wasteful number, since it uses less digits than its factorization.

32920972409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532382506.

The product of its (nonzero) digits is 489888, while the sum is 47.

The spelling of 32920972409 in words is "thirty-two billion, nine hundred twenty million, nine hundred seventy-two thousand, four hundred nine".