61534507 has 2 divisors, whose sum is σ = 61534508. Its totient is φ = 61534506.

The previous prime is 61534477. The next prime is 61534531. The reversal of 61534507 is 70543516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61534507 - 2⁷ = 61534379 is a prime.

It is not a weakly prime, because it can be changed into another prime (61534307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30767253 + 30767254.

It is an arithmetic number, because the mean of its divisors is an integer number (30767254).

Almost surely, 2^61534507 is an apocalyptic number.

61534507 is a deficient number, since it is larger than the sum of its proper divisors (1).

61534507 is an equidigital number, since it uses as much as digits as its factorization.

61534507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 61534507 is about 7844.3933481181. The cubic root of 61534507 is about 394.7961496894.

Subtracting 61534507 from its reverse (70543516), we obtain a palindrome (9009009).

The spelling of 61534507 in words is "sixty-one million, five hundred thirty-four thousand, five hundred seven".