61904057 has 2 divisors, whose sum is σ = 61904058. Its totient is φ = 61904056.

The previous prime is 61904041. The next prime is 61904113. The reversal of 61904057 is 75040916.

It is a happy number.

61904057 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 can be written as a sum of positive squares in only one way, i.e., 45751696 + 16152361 = 6764^2 + 4019^2 .

It is a cyclic number.

It is not a de Polignac number, because 61904057 - 2⁴ = 61904041 is a prime.

It is a super-2 number, since 2×61904057² = 7664224546118498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61904027) 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, 30952028 + 30952029.

It is an arithmetic number, because the mean of its divisors is an integer number (30952029).

Almost surely, 2^61904057 is an apocalyptic number.

It is an amenable number.

61904057 is a deficient number, since it is larger than the sum of its proper divisors (1).

61904057 is an equidigital number, since it uses as much as digits as its factorization.

61904057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 61904057 is about 7867.9131286511. The cubic root of 61904057 is about 395.5848985822.

The spelling of 61904057 in words is "sixty-one million, nine hundred four thousand, fifty-seven".