9721201477 has 16 divisors (see below), whose sum is σ = 11668224960. Its totient is φ = 8001061632.

The previous prime is 9721201423. The next prime is 9721201507. The reversal of 9721201477 is 7741021279.

It is a cyclic number.

It is not a de Polignac number, because 9721201477 - 2⁷ = 9721201349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9721201277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1153363 + ... + 1161760.

It is an arithmetic number, because the mean of its divisors is an integer number (729264060).

Almost surely, 2^9721201477 is an apocalyptic number.

It is an amenable number.

9721201477 is a deficient number, since it is larger than the sum of its proper divisors (1947023483).

9721201477 is a wasteful number, since it uses less digits than its factorization.

9721201477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2315172.

The product of its (nonzero) digits is 49392, while the sum is 40.

The square root of 9721201477 is about 98596.1534594530. The cubic root of 9721201477 is about 2134.2239116946.

The spelling of 9721201477 in words is "nine billion, seven hundred twenty-one million, two hundred one thousand, four hundred seventy-seven".