30479947 has 2 divisors, whose sum is σ = 30479948. Its totient is φ = 30479946.

The previous prime is 30479927. The next prime is 30479951. The reversal of 30479947 is 74997403.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30479947 is a prime.

It is a super-3 number, since 3×30479947³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (30479927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15239973 + 15239974.

It is an arithmetic number, because the mean of its divisors is an integer number (15239974).

Almost surely, 2^30479947 is an apocalyptic number.

30479947 is a deficient number, since it is larger than the sum of its proper divisors (1).

30479947 is an equidigital number, since it uses as much as digits as its factorization.

30479947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 30479947 is about 5520.8646967663. The cubic root of 30479947 is about 312.3714995944.

The spelling of 30479947 in words is "thirty million, four hundred seventy-nine thousand, nine hundred forty-seven".