61514729 has 4 divisors (see below), whose sum is σ = 61806480. Its totient is φ = 61222980.

The previous prime is 61514707. The next prime is 61514731. The reversal of 61514729 is 92741516.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61514729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61514759) 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, 145559 + ... + 145980.

It is an arithmetic number, because the mean of its divisors is an integer number (15451620).

Almost surely, 2^61514729 is an apocalyptic number.

It is an amenable number.

61514729 is a deficient number, since it is larger than the sum of its proper divisors (291751).

61514729 is a wasteful number, since it uses less digits than its factorization.

61514729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291750.

The product of its digits is 15120, while the sum is 35.

The square root of 61514729 is about 7843.1326011996. The cubic root of 61514729 is about 394.7538475983.

The spelling of 61514729 in words is "sixty-one million, five hundred fourteen thousand, seven hundred twenty-nine".