30147661 has 4 divisors (see below), whose sum is σ = 31734400. Its totient is φ = 28560924.

The previous prime is 30147659. The next prime is 30147671. The reversal of 30147661 is 16674103.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16674103 = 23 ⋅724961.

It is a cyclic number.

It is not a de Polignac number, because 30147661 - 2¹ = 30147659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30147671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 793341 + ... + 793378.

It is an arithmetic number, because the mean of its divisors is an integer number (7933600).

Almost surely, 2^30147661 is an apocalyptic number.

It is an amenable number.

30147661 is a deficient number, since it is larger than the sum of its proper divisors (1586739).

30147661 is a wasteful number, since it uses less digits than its factorization.

30147661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586738.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 30147661 is about 5490.6885724834. The cubic root of 30147661 is about 311.2322131952.

The spelling of 30147661 in words is "thirty million, one hundred forty-seven thousand, six hundred sixty-one".