61690379 has 2 divisors, whose sum is σ = 61690380. Its totient is φ = 61690378.

The previous prime is 61690373. The next prime is 61690471. The reversal of 61690379 is 97309616.

It is a happy number.

61690379 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61690379 - 2²⁰ = 60641803 is a prime.

It is a super-2 number, since 2×61690379² = 7611405722327282, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61690373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30845189 + 30845190.

It is an arithmetic number, because the mean of its divisors is an integer number (30845190).

Almost surely, 2^61690379 is an apocalyptic number.

61690379 is a deficient number, since it is larger than the sum of its proper divisors (1).

61690379 is an equidigital number, since it uses as much as digits as its factorization.

61690379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 61690379 is about 7854.3223132235. The cubic root of 61690379 is about 395.1292190594.

The spelling of 61690379 in words is "sixty-one million, six hundred ninety thousand, three hundred seventy-nine".