290728093 has 2 divisors, whose sum is σ = 290728094. Its totient is φ = 290728092.

The previous prime is 290728049. The next prime is 290728099. The reversal of 290728093 is 390827092.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176943204 + 113784889 = 13302^2 + 10667^2 .

It is a cyclic number.

It is not a de Polignac number, because 290728093 - 2²⁵ = 257173661 is a prime.

It is equal to p_15776770 and since 290728093 and 15776770 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (290728099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145364046 + 145364047.

It is an arithmetic number, because the mean of its divisors is an integer number (145364047).

Almost surely, 2^290728093 is an apocalyptic number.

It is an amenable number.

290728093 is a deficient number, since it is larger than the sum of its proper divisors (1).

290728093 is an equidigital number, since it uses as much as digits as its factorization.

290728093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 290728093 is about 17050.7505113411. The cubic root of 290728093 is about 662.4640772263.

The spelling of 290728093 in words is "two hundred ninety million, seven hundred twenty-eight thousand, ninety-three".