290021357 has 2 divisors, whose sum is σ = 290021358. Its totient is φ = 290021356.

The previous prime is 290021341. The next prime is 290021387. The reversal of 290021357 is 753120092.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 289714441 + 306916 = 17021^2 + 554^2 .

It is a cyclic number.

It is not a de Polignac number, because 290021357 - 2⁴ = 290021341 is a prime.

It is a super-2 number, since 2×290021357² = 168224775032242898, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (290021317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145010678 + 145010679.

It is an arithmetic number, because the mean of its divisors is an integer number (145010679).

Almost surely, 2^290021357 is an apocalyptic number.

It is an amenable number.

290021357 is a deficient number, since it is larger than the sum of its proper divisors (1).

290021357 is an equidigital number, since it uses as much as digits as its factorization.

290021357 is an odious number, because the sum of its binary digits is odd.

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

The square root of 290021357 is about 17030.0134174932. The cubic root of 290021357 is about 661.9268431676.

The spelling of 290021357 in words is "two hundred ninety million, twenty-one thousand, three hundred fifty-seven".