47655661 has 2 divisors, whose sum is σ = 47655662. Its totient is φ = 47655660.

The previous prime is 47655637. The next prime is 47655683. The reversal of 47655661 is 16655674.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46321636 + 1334025 = 6806^2 + 1155^2 .

It is a cyclic number.

It is not a de Polignac number, because 47655661 - 2¹³ = 47647469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47655691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23827830 + 23827831.

It is an arithmetic number, because the mean of its divisors is an integer number (23827831).

Almost surely, 2^47655661 is an apocalyptic number.

It is an amenable number.

47655661 is a deficient number, since it is larger than the sum of its proper divisors (1).

47655661 is an equidigital number, since it uses as much as digits as its factorization.

47655661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 40.

The square root of 47655661 is about 6903.3079751667. The cubic root of 47655661 is about 362.5529967700.

The spelling of 47655661 in words is "forty-seven million, six hundred fifty-five thousand, six hundred sixty-one".