30700979 has 4 divisors (see below), whose sum is σ = 32316840. Its totient is φ = 29085120.

The previous prime is 30700933. The next prime is 30701051. The reversal of 30700979 is 97900703.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97900703 = 8731 ⋅11213.

It is a cyclic number.

It is not a de Polignac number, because 30700979 - 2⁸ = 30700723 is a prime.

It is a super-2 number, since 2×30700979² = 1885100223116882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30700909) 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, 807902 + ... + 807939.

It is an arithmetic number, because the mean of its divisors is an integer number (8079210).

Almost surely, 2^30700979 is an apocalyptic number.

30700979 is a deficient number, since it is larger than the sum of its proper divisors (1615861).

30700979 is a wasteful number, since it uses less digits than its factorization.

30700979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615860.

The product of its (nonzero) digits is 11907, while the sum is 35.

The square root of 30700979 is about 5540.8464154856. The cubic root of 30700979 is about 313.1247584536.

The spelling of 30700979 in words is "thirty million, seven hundred thousand, nine hundred seventy-nine".