61653607 has 2 divisors, whose sum is σ = 61653608. Its totient is φ = 61653606.

The previous prime is 61653587. The next prime is 61653619. The reversal of 61653607 is 70635616.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61653607 - 2¹¹ = 61651559 is a prime.

It is a super-2 number, since 2×61653607² = 7602334512220898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61653107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30826803 + 30826804.

It is an arithmetic number, because the mean of its divisors is an integer number (30826804).

Almost surely, 2^61653607 is an apocalyptic number.

61653607 is a deficient number, since it is larger than the sum of its proper divisors (1).

61653607 is an equidigital number, since it uses as much as digits as its factorization.

61653607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 61653607 is about 7851.9810875982. The cubic root of 61653607 is about 395.0506947700.

Subtracting 61653607 from its reverse (70635616), we obtain a square (8982009 = 2997²).

The spelling of 61653607 in words is "sixty-one million, six hundred fifty-three thousand, six hundred seven".