97428321 has 12 divisors (see below), whose sum is σ = 143724672. Its totient is φ = 63569976.

The previous prime is 97428311. The next prime is 97428349. The reversal of 97428321 is 12382479.

It is not a de Polignac number, because 97428321 - 2¹³ = 97420129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97428311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114741 + ... + 115586.

It is an arithmetic number, because the mean of its divisors is an integer number (11977056).

Almost surely, 2^97428321 is an apocalyptic number.

It is an amenable number.

97428321 is a deficient number, since it is larger than the sum of its proper divisors (46296351).

97428321 is a wasteful number, since it uses less digits than its factorization.

97428321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230380 (or 230377 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 97428321 is about 9870.5785544719. The cubic root of 97428321 is about 460.1453872515.

The spelling of 97428321 in words is "ninety-seven million, four hundred twenty-eight thousand, three hundred twenty-one".