61867457 has 2 divisors, whose sum is σ = 61867458. Its totient is φ = 61867456.

The previous prime is 61867417. The next prime is 61867499. The reversal of 61867457 is 75476816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53129521 + 8737936 = 7289^2 + 2956^2 .

It is a cyclic number.

It is not a de Polignac number, because 61867457 - 2¹⁰ = 61866433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61867417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30933728 + 30933729.

It is an arithmetic number, because the mean of its divisors is an integer number (30933729).

Almost surely, 2^61867457 is an apocalyptic number.

It is an amenable number.

61867457 is a deficient number, since it is larger than the sum of its proper divisors (1).

61867457 is an equidigital number, since it uses as much as digits as its factorization.

61867457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 44.

The square root of 61867457 is about 7865.5868821087. The cubic root of 61867457 is about 395.5069216702.

The spelling of 61867457 in words is "sixty-one million, eight hundred sixty-seven thousand, four hundred fifty-seven".