61783951 has 2 divisors, whose sum is σ = 61783952. Its totient is φ = 61783950.

The previous prime is 61783937. The next prime is 61783979. The reversal of 61783951 is 15938716.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61783951 - 2¹¹ = 61781903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61783921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30891975 + 30891976.

It is an arithmetic number, because the mean of its divisors is an integer number (30891976).

Almost surely, 2^61783951 is an apocalyptic number.

61783951 is a deficient number, since it is larger than the sum of its proper divisors (1).

61783951 is an equidigital number, since it uses as much as digits as its factorization.

61783951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 40.

The square root of 61783951 is about 7860.2767762974. The cubic root of 61783951 is about 395.3288955408.

The spelling of 61783951 in words is "sixty-one million, seven hundred eighty-three thousand, nine hundred fifty-one".