730521897 has 16 divisors (see below), whose sum is σ = 1114088832. Its totient is φ = 417098880.

The previous prime is 730521881. The next prime is 730521923. The reversal of 730521897 is 798125037.

It is not a de Polignac number, because 730521897 - 2⁴ = 730521881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (730525897) 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, 13197 + ... + 40437.

It is an arithmetic number, because the mean of its divisors is an integer number (69630552).

Almost surely, 2^730521897 is an apocalyptic number.

It is an amenable number.

730521897 is a deficient number, since it is larger than the sum of its proper divisors (383566935).

730521897 is a wasteful number, since it uses less digits than its factorization.

730521897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28528.

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 730521897 is about 27028.1685839052. The cubic root of 730521897 is about 900.6258597382.

The spelling of 730521897 in words is "seven hundred thirty million, five hundred twenty-one thousand, eight hundred ninety-seven".