61983257 has 4 divisors (see below), whose sum is σ = 70838016. Its totient is φ = 53128500.

The previous prime is 61983227. The next prime is 61983277. The reversal of 61983257 is 75238916.

61983257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61983257 - 2⁸ = 61983001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61983227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4427369 + ... + 4427382.

It is an arithmetic number, because the mean of its divisors is an integer number (17709504).

Almost surely, 2^61983257 is an apocalyptic number.

It is an amenable number.

61983257 is a deficient number, since it is larger than the sum of its proper divisors (8854759).

61983257 is an equidigital number, since it uses as much as digits as its factorization.

61983257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8854758.

The product of its digits is 90720, while the sum is 41.

The square root of 61983257 is about 7872.9446206613. The cubic root of 61983257 is about 395.7535303523.

The spelling of 61983257 in words is "sixty-one million, nine hundred eighty-three thousand, two hundred fifty-seven".