30707997 has 8 divisors (see below), whose sum is σ = 41520960. Its totient is φ = 20183520.

The previous prime is 30707983. The next prime is 30708017. The reversal of 30707997 is 79970703.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30707997 - 2⁴ = 30707981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30707947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71872 + ... + 72297.

It is an arithmetic number, because the mean of its divisors is an integer number (5190120).

Almost surely, 2^30707997 is an apocalyptic number.

It is an amenable number.

30707997 is a deficient number, since it is larger than the sum of its proper divisors (10812963).

30707997 is a wasteful number, since it uses less digits than its factorization.

30707997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144243.

The product of its (nonzero) digits is 83349, while the sum is 42.

The square root of 30707997 is about 5541.4796760432. The cubic root of 30707997 is about 313.1486159136.

The spelling of 30707997 in words is "thirty million, seven hundred seven thousand, nine hundred ninety-seven".