61512853 has 2 divisors, whose sum is σ = 61512854. Its totient is φ = 61512852.

The previous prime is 61512839. The next prime is 61512859. The reversal of 61512853 is 35821516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58629649 + 2883204 = 7657^2 + 1698^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61512853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61512859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30756426 + 30756427.

It is an arithmetic number, because the mean of its divisors is an integer number (30756427).

Almost surely, 2^61512853 is an apocalyptic number.

It is an amenable number.

61512853 is a deficient number, since it is larger than the sum of its proper divisors (1).

61512853 is an equidigital number, since it uses as much as digits as its factorization.

61512853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 31.

The square root of 61512853 is about 7843.0130052168. The cubic root of 61512853 is about 394.7498346529.

The spelling of 61512853 in words is "sixty-one million, five hundred twelve thousand, eight hundred fifty-three".