32991137 has 2 divisors, whose sum is σ = 32991138. Its totient is φ = 32991136.

The previous prime is 32991103. The next prime is 32991149. The reversal of 32991137 is 73119923.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31259281 + 1731856 = 5591^2 + 1316^2 .

It is a cyclic number.

It is not a de Polignac number, because 32991137 - 2²⁴ = 16213921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 32991097 and 32991106.

It is not a weakly prime, because it can be changed into another prime (32991187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16495568 + 16495569.

It is an arithmetic number, because the mean of its divisors is an integer number (16495569).

Almost surely, 2^32991137 is an apocalyptic number.

It is an amenable number.

32991137 is a deficient number, since it is larger than the sum of its proper divisors (1).

32991137 is an equidigital number, since it uses as much as digits as its factorization.

32991137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206, while the sum is 35.

The square root of 32991137 is about 5743.7911696022. The cubic root of 32991137 is about 320.7247148963.

The spelling of 32991137 in words is "thirty-two million, nine hundred ninety-one thousand, one hundred thirty-seven".