730642457 has 2 divisors, whose sum is σ = 730642458. Its totient is φ = 730642456.

The previous prime is 730642433. The next prime is 730642537. The reversal of 730642457 is 754246037.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 462207001 + 268435456 = 21499^2 + 16384^2 .

It is a cyclic number.

It is not a de Polignac number, because 730642457 - 2²⁰ = 729593881 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 730642457.

It is not a weakly prime, because it can be changed into another prime (730642417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365321228 + 365321229.

It is an arithmetic number, because the mean of its divisors is an integer number (365321229).

Almost surely, 2^730642457 is an apocalyptic number.

It is an amenable number.

730642457 is a deficient number, since it is larger than the sum of its proper divisors (1).

730642457 is an equidigital number, since it uses as much as digits as its factorization.

730642457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 38.

The square root of 730642457 is about 27030.3987576950. The cubic root of 730642457 is about 900.6754012516.

The spelling of 730642457 in words is "seven hundred thirty million, six hundred forty-two thousand, four hundred fifty-seven".