61438633 has 2 divisors, whose sum is σ = 61438634. Its totient is φ = 61438632.

The previous prime is 61438583. The next prime is 61438661. The reversal of 61438633 is 33683416.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56070144 + 5368489 = 7488^2 + 2317^2 .

It is a cyclic number.

It is not a de Polignac number, because 61438633 - 2¹³ = 61430441 is a prime.

It is not a weakly prime, because it can be changed into another prime (61438673) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30719316 + 30719317.

It is an arithmetic number, because the mean of its divisors is an integer number (30719317).

Almost surely, 2^61438633 is an apocalyptic number.

It is an amenable number.

61438633 is a deficient number, since it is larger than the sum of its proper divisors (1).

61438633 is an equidigital number, since it uses as much as digits as its factorization.

61438633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 34.

The square root of 61438633 is about 7838.2799771378. The cubic root of 61438633 is about 394.5910053851.

The spelling of 61438633 in words is "sixty-one million, four hundred thirty-eight thousand, six hundred thirty-three".