30969797 has 4 divisors (see below), whose sum is σ = 31243980. Its totient is φ = 30695616.

The previous prime is 30969787. The next prime is 30969821. The reversal of 30969797 is 79796903.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79796903 = 19 ⋅4199837.

It can be written as a sum of positive squares in 2 ways, for example, as 9449476 + 21520321 = 3074^2 + 4639^2 .

It is a cyclic number.

It is not a de Polignac number, because 30969797 - 2⁴ = 30969781 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 (30969727) 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, 136922 + ... + 137147.

It is an arithmetic number, because the mean of its divisors is an integer number (7810995).

Almost surely, 2^30969797 is an apocalyptic number.

It is an amenable number.

30969797 is a deficient number, since it is larger than the sum of its proper divisors (274183).

30969797 is a wasteful number, since it uses less digits than its factorization.

30969797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274182.

The product of its (nonzero) digits is 642978, while the sum is 50.

The square root of 30969797 is about 5565.0513923952. The cubic root of 30969797 is about 314.0360115297.

The spelling of 30969797 in words is "thirty million, nine hundred sixty-nine thousand, seven hundred ninety-seven".