604002991 has 2 divisors, whose sum is σ = 604002992. Its totient is φ = 604002990.

The previous prime is 604002961. The next prime is 604003007. The reversal of 604002991 is 199200406.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 604002991 - 2⁷ = 604002863 is a prime.

It is a super-2 number, since 2×604002991² = 729639226273892162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (604002941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302001495 + 302001496.

It is an arithmetic number, because the mean of its divisors is an integer number (302001496).

Almost surely, 2^604002991 is an apocalyptic number.

604002991 is a deficient number, since it is larger than the sum of its proper divisors (1).

604002991 is an equidigital number, since it uses as much as digits as its factorization.

604002991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 604002991 is about 24576.4723058457. The cubic root of 604002991 is about 845.3042056792.

The spelling of 604002991 in words is "six hundred four million, two thousand, nine hundred ninety-one".