61790345 has 4 divisors (see below), whose sum is σ = 74148420. Its totient is φ = 49432272.

The previous prime is 61790341. The next prime is 61790357. The reversal of 61790345 is 54309716.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47554816 + 14235529 = 6896^2 + 3773^2 .

It is a cyclic number.

It is not a de Polignac number, because 61790345 - 2² = 61790341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61790341) 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, 6179030 + ... + 6179039.

It is an arithmetic number, because the mean of its divisors is an integer number (18537105).

Almost surely, 2^61790345 is an apocalyptic number.

It is an amenable number.

61790345 is a deficient number, since it is larger than the sum of its proper divisors (12358075).

61790345 is a wasteful number, since it uses less digits than its factorization.

61790345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12358074.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 61790345 is about 7860.6834944552. The cubic root of 61790345 is about 395.3425325546.

The spelling of 61790345 in words is "sixty-one million, seven hundred ninety thousand, three hundred forty-five".