61690313 has 2 divisors, whose sum is σ = 61690314. Its totient is φ = 61690312.

The previous prime is 61690303. The next prime is 61690333. The reversal of 61690313 is 31309616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41512249 + 20178064 = 6443^2 + 4492^2 .

It is a cyclic number.

It is not a de Polignac number, because 61690313 - 2⁶ = 61690249 is a prime.

It is not a weakly prime, because it can be changed into another prime (61690303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30845156 + 30845157.

It is an arithmetic number, because the mean of its divisors is an integer number (30845157).

Almost surely, 2^61690313 is an apocalyptic number.

It is an amenable number.

61690313 is a deficient number, since it is larger than the sum of its proper divisors (1).

61690313 is an equidigital number, since it uses as much as digits as its factorization.

61690313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 61690313 is about 7854.3181117141. The cubic root of 61690313 is about 395.1290781485.

Adding to 61690313 its reverse (31309616), we get a palindrome (92999929).

The spelling of 61690313 in words is "sixty-one million, six hundred ninety thousand, three hundred thirteen".