61384657 has 2 divisors, whose sum is σ = 61384658. Its totient is φ = 61384656.

The previous prime is 61384643. The next prime is 61384699. The reversal of 61384657 is 75648316.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41679936 + 19704721 = 6456^2 + 4439^2 .

It is a cyclic number.

It is not a de Polignac number, because 61384657 - 2¹⁵ = 61351889 is a prime.

It is a super-2 number, since 2×61384657² = 7536152230015298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61384627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30692328 + 30692329.

It is an arithmetic number, because the mean of its divisors is an integer number (30692329).

Almost surely, 2^61384657 is an apocalyptic number.

It is an amenable number.

61384657 is a deficient number, since it is larger than the sum of its proper divisors (1).

61384657 is an equidigital number, since it uses as much as digits as its factorization.

61384657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 61384657 is about 7834.8361182605. The cubic root of 61384657 is about 394.4754175036.

The spelling of 61384657 in words is "sixty-one million, three hundred eighty-four thousand, six hundred fifty-seven".