61478633 has 2 divisors, whose sum is σ = 61478634. Its totient is φ = 61478632.

The previous prime is 61478621. The next prime is 61478657. The reversal of 61478633 is 33687416.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59552089 + 1926544 = 7717^2 + 1388^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61478633 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (61478603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30739316 + 30739317.

It is an arithmetic number, because the mean of its divisors is an integer number (30739317).

Almost surely, 2^61478633 is an apocalyptic number.

It is an amenable number.

61478633 is a deficient number, since it is larger than the sum of its proper divisors (1).

61478633 is an equidigital number, since it uses as much as digits as its factorization.

61478633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 38.

The square root of 61478633 is about 7840.8311421685. The cubic root of 61478633 is about 394.6766204417.

The spelling of 61478633 in words is "sixty-one million, four hundred seventy-eight thousand, six hundred thirty-three".