35998021 has 2 divisors, whose sum is σ = 35998022. Its totient is φ = 35998020.

The previous prime is 35997943. The next prime is 35998033. The reversal of 35998021 is 12089953.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30305025 + 5692996 = 5505^2 + 2386^2 .

It is a cyclic number.

It is not a de Polignac number, because 35998021 - 2⁷ = 35997893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (35998051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17999010 + 17999011.

It is an arithmetic number, because the mean of its divisors is an integer number (17999011).

Almost surely, 2^35998021 is an apocalyptic number.

It is an amenable number.

35998021 is a deficient number, since it is larger than the sum of its proper divisors (1).

35998021 is an equidigital number, since it uses as much as digits as its factorization.

35998021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 35998021 is about 5999.8350810668. The cubic root of 35998021 is about 330.1866743026.

The spelling of 35998021 in words is "thirty-five million, nine hundred ninety-eight thousand, twenty-one".