61709790 has 16 divisors (see below), whose sum is σ = 148103568. Its totient is φ = 16455936.

The previous prime is 61709771. The next prime is 61709803. The reversal of 61709790 is 9790716.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1028467 + ... + 1028526.

It is an arithmetic number, because the mean of its divisors is an integer number (9256473).

Almost surely, 2^61709790 is an apocalyptic number.

61709790 is an abundant number, since it is smaller than the sum of its proper divisors (86393778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61709790 is a wasteful number, since it uses less digits than its factorization.

61709790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057003.

The product of its (nonzero) digits is 23814, while the sum is 39.

The square root of 61709790 is about 7855.5579050759. The cubic root of 61709790 is about 395.1706574441.

The spelling of 61709790 in words is "sixty-one million, seven hundred nine thousand, seven hundred ninety".