61390061 has 4 divisors (see below), whose sum is σ = 61475232. Its totient is φ = 61304892.

The previous prime is 61390057. The next prime is 61390081. The reversal of 61390061 is 16009316.

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 not a de Polignac number, because 61390061 - 2² = 61390057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61390061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61390001) 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, 41495 + ... + 42948.

It is an arithmetic number, because the mean of its divisors is an integer number (15368808).

Almost surely, 2^61390061 is an apocalyptic number.

It is an amenable number.

61390061 is a deficient number, since it is larger than the sum of its proper divisors (85171).

61390061 is an equidigital number, since it uses as much as digits as its factorization.

61390061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85170.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 61390061 is about 7835.1809806794. The cubic root of 61390061 is about 394.4869930488.

Adding to 61390061 its reverse (16009316), we get a palindrome (77399377).

The spelling of 61390061 in words is "sixty-one million, three hundred ninety thousand, sixty-one".