61912357 has 4 divisors (see below), whose sum is σ = 66674860. Its totient is φ = 57149856.

The previous prime is 61912349. The next prime is 61912369. The reversal of 61912357 is 75321916.

61912357 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 23049601 + 38862756 = 4801^2 + 6234^2 .

It is a cyclic number.

It is not a de Polignac number, because 61912357 - 2³ = 61912349 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61912307) 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 in 3 ways as a sum of consecutive naturals, for example, 2381232 + ... + 2381257.

It is an arithmetic number, because the mean of its divisors is an integer number (16668715).

Almost surely, 2^61912357 is an apocalyptic number.

It is an amenable number.

61912357 is a deficient number, since it is larger than the sum of its proper divisors (4762503).

61912357 is a wasteful number, since it uses less digits than its factorization.

61912357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4762502.

The product of its digits is 11340, while the sum is 34.

The square root of 61912357 is about 7868.4405697698. The cubic root of 61912357 is about 395.6025775955.

The spelling of 61912357 in words is "sixty-one million, nine hundred twelve thousand, three hundred fifty-seven".