30936989 has 2 divisors, whose sum is σ = 30936990. Its totient is φ = 30936988.

The previous prime is 30936973. The next prime is 30937003. The reversal of 30936989 is 98963903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25452025 + 5484964 = 5045^2 + 2342^2 .

It is a cyclic number.

It is not a de Polignac number, because 30936989 - 2⁴ = 30936973 is a prime.

It is a super-2 number, since 2×30936989² = 1914194576772242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30933989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15468494 + 15468495.

It is an arithmetic number, because the mean of its divisors is an integer number (15468495).

Almost surely, 2^30936989 is an apocalyptic number.

It is an amenable number.

30936989 is a deficient number, since it is larger than the sum of its proper divisors (1).

30936989 is an equidigital number, since it uses as much as digits as its factorization.

30936989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 30936989 is about 5562.1029296481. The cubic root of 30936989 is about 313.9250805071.

The spelling of 30936989 in words is "thirty million, nine hundred thirty-six thousand, nine hundred eighty-nine".