30490819 has 2 divisors, whose sum is σ = 30490820. Its totient is φ = 30490818.

The previous prime is 30490783. The next prime is 30490841. The reversal of 30490819 is 91809403.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30490819 - 2²¹ = 28393667 is a prime.

It is a super-2 number, since 2×30490819² = 1859380086581522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30490519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15245409 + 15245410.

It is an arithmetic number, because the mean of its divisors is an integer number (15245410).

Almost surely, 2^30490819 is an apocalyptic number.

30490819 is a deficient number, since it is larger than the sum of its proper divisors (1).

30490819 is an equidigital number, since it uses as much as digits as its factorization.

30490819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 30490819 is about 5521.8492373479. The cubic root of 30490819 is about 312.4086354773.

The spelling of 30490819 in words is "thirty million, four hundred ninety thousand, eight hundred nineteen".