30421487 has 2 divisors, whose sum is σ = 30421488. Its totient is φ = 30421486.

The previous prime is 30421481. The next prime is 30421499. The reversal of 30421487 is 78412403.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30421487 - 2⁴ = 30421471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30421481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15210743 + 15210744.

It is an arithmetic number, because the mean of its divisors is an integer number (15210744).

Almost surely, 2^30421487 is an apocalyptic number.

30421487 is a deficient number, since it is larger than the sum of its proper divisors (1).

30421487 is an equidigital number, since it uses as much as digits as its factorization.

30421487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 30421487 is about 5515.5676951697. The cubic root of 30421487 is about 312.1716641066.

The spelling of 30421487 in words is "thirty million, four hundred twenty-one thousand, four hundred eighty-seven".