30157969 has 2 divisors, whose sum is σ = 30157970. Its totient is φ = 30157968.

The previous prime is 30157961. The next prime is 30158021. The reversal of 30157969 is 96975103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29844369 + 313600 = 5463^2 + 560^2 .

It is an emirp because it is prime and its reverse (96975103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30157969 - 2³ = 30157961 is a prime.

It is a super-2 number, since 2×30157969² = 1819006188409922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30157961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15078984 + 15078985.

It is an arithmetic number, because the mean of its divisors is an integer number (15078985).

Almost surely, 2^30157969 is an apocalyptic number.

It is an amenable number.

30157969 is a deficient number, since it is larger than the sum of its proper divisors (1).

30157969 is an equidigital number, since it uses as much as digits as its factorization.

30157969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 30157969 is about 5491.6271723415. The cubic root of 30157969 is about 311.2676810222.

The spelling of 30157969 in words is "thirty million, one hundred fifty-seven thousand, nine hundred sixty-nine".