61504289 has 8 divisors (see below), whose sum is σ = 76680768. Its totient is φ = 47925360.

The previous prime is 61504271. The next prime is 61504297. The reversal of 61504289 is 98240516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61504289 - 2²⁰ = 60455713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61504229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399302 + ... + 399455.

It is an arithmetic number, because the mean of its divisors is an integer number (9585096).

Almost surely, 2^61504289 is an apocalyptic number.

It is an amenable number.

61504289 is a deficient number, since it is larger than the sum of its proper divisors (15176479).

61504289 is a wasteful number, since it uses less digits than its factorization.

61504289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798775.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 61504289 is about 7842.4670225638. The cubic root of 61504289 is about 394.7315143923.

It can be divided in two parts, 61504 and 289, that multiplied together give a square (17774656 = 4216²).

The spelling of 61504289 in words is "sixty-one million, five hundred four thousand, two hundred eighty-nine".