61783937 has 2 divisors, whose sum is σ = 61783938. Its totient is φ = 61783936.

The previous prime is 61783921. The next prime is 61783951. The reversal of 61783937 is 73938716.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31764496 + 30019441 = 5636^2 + 5479^2 .

It is a cyclic number.

It is not a de Polignac number, because 61783937 - 2⁴ = 61783921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61783907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30891968 + 30891969.

It is an arithmetic number, because the mean of its divisors is an integer number (30891969).

Almost surely, 2^61783937 is an apocalyptic number.

It is an amenable number.

61783937 is a deficient number, since it is larger than the sum of its proper divisors (1).

61783937 is an equidigital number, since it uses as much as digits as its factorization.

61783937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 44.

The square root of 61783937 is about 7860.2758857435. The cubic root of 61783937 is about 395.3288656808.

The spelling of 61783937 in words is "sixty-one million, seven hundred eighty-three thousand, nine hundred thirty-seven".