61129951 has 2 divisors, whose sum is σ = 61129952. Its totient is φ = 61129950.

The previous prime is 61129933. The next prime is 61129969. The reversal of 61129951 is 15992116.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (61129933) and next prime (61129969).

It is a cyclic number.

It is not a de Polignac number, because 61129951 - 2⁵ = 61129919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61129921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30564975 + 30564976.

It is an arithmetic number, because the mean of its divisors is an integer number (30564976).

Almost surely, 2^61129951 is an apocalyptic number.

61129951 is a deficient number, since it is larger than the sum of its proper divisors (1).

61129951 is an equidigital number, since it uses as much as digits as its factorization.

61129951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 34.

The square root of 61129951 is about 7818.5645101898. The cubic root of 61129951 is about 393.9290565148.

The spelling of 61129951 in words is "sixty-one million, one hundred twenty-nine thousand, nine hundred fifty-one".