61651123 has 2 divisors, whose sum is σ = 61651124. Its totient is φ = 61651122.

The previous prime is 61651103. The next prime is 61651133. The reversal of 61651123 is 32115616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61651123 - 2¹⁷ = 61520051 is a prime.

It is a super-2 number, since 2×61651123² = 7601721934322258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61651103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30825561 + 30825562.

It is an arithmetic number, because the mean of its divisors is an integer number (30825562).

Almost surely, 2^61651123 is an apocalyptic number.

61651123 is a deficient number, since it is larger than the sum of its proper divisors (1).

61651123 is an equidigital number, since it uses as much as digits as its factorization.

61651123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 25.

The square root of 61651123 is about 7851.8229093631. The cubic root of 61651123 is about 395.0453892188.

Adding to 61651123 its reverse (32115616), we get a palindrome (93766739).

The spelling of 61651123 in words is "sixty-one million, six hundred fifty-one thousand, one hundred twenty-three".