61653259 has 4 divisors (see below), whose sum is σ = 62433760. Its totient is φ = 60872760.

The previous prime is 61653239. The next prime is 61653269. The reversal of 61653259 is 95235616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61653259 - 2⁷ = 61653131 is a prime.

It is a super-2 number, since 2×61653259² = 7602248690642162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61653209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390132 + ... + 390289.

It is an arithmetic number, because the mean of its divisors is an integer number (15608440).

Almost surely, 2^61653259 is an apocalyptic number.

61653259 is a deficient number, since it is larger than the sum of its proper divisors (780501).

61653259 is an equidigital number, since it uses as much as digits as its factorization.

61653259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780500.

The product of its digits is 48600, while the sum is 37.

The square root of 61653259 is about 7851.9589275543. The cubic root of 61653259 is about 395.0499514888.

The spelling of 61653259 in words is "sixty-one million, six hundred fifty-three thousand, two hundred fifty-nine".