730502921 has 2 divisors, whose sum is σ = 730502922. Its totient is φ = 730502920.

The previous prime is 730502831. The next prime is 730502933. The reversal of 730502921 is 129205037.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 410629696 + 319873225 = 20264^2 + 17885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-730502921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (730502621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365251460 + 365251461.

It is an arithmetic number, because the mean of its divisors is an integer number (365251461).

Almost surely, 2^730502921 is an apocalyptic number.

It is an amenable number.

730502921 is a deficient number, since it is larger than the sum of its proper divisors (1).

730502921 is an equidigital number, since it uses as much as digits as its factorization.

730502921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 730502921 is about 27027.8175404527. The cubic root of 730502921 is about 900.6180614667.

Adding to 730502921 its reverse (129205037), we get a palindrome (859707958).

The spelling of 730502921 in words is "seven hundred thirty million, five hundred two thousand, nine hundred twenty-one".