61790591 has 8 divisors (see below), whose sum is σ = 62266944. Its totient is φ = 61316640.

The previous prime is 61790587. The next prime is 61790593. The reversal of 61790591 is 19509716.

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

It is a cyclic number.

It is not a de Polignac number, because 61790591 - 2² = 61790587 is a prime.

It is a super-2 number, since 2×61790591² = 7636154272258562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61790593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133226 + ... + 133688.

It is an arithmetic number, because the mean of its divisors is an integer number (7783368).

Almost surely, 2^61790591 is an apocalyptic number.

61790591 is a deficient number, since it is larger than the sum of its proper divisors (476353).

61790591 is a wasteful number, since it uses less digits than its factorization.

61790591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201.

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 61790591 is about 7860.6991419339. The cubic root of 61790591 is about 395.3430572004.

The spelling of 61790591 in words is "sixty-one million, seven hundred ninety thousand, five hundred ninety-one".