61326437 has 2 divisors, whose sum is σ = 61326438. Its totient is φ = 61326436.

The previous prime is 61326413. The next prime is 61326439. The reversal of 61326437 is 73462316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58997761 + 2328676 = 7681^2 + 1526^2 .

It is a cyclic number.

It is not a de Polignac number, because 61326437 - 2¹⁰ = 61325413 is a prime.

It is a super-2 number, since 2×61326437² = 7521863750229938, which contains 22 as substring.

Together with 61326439, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61326439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30663218 + 30663219.

It is an arithmetic number, because the mean of its divisors is an integer number (30663219).

Almost surely, 2^61326437 is an apocalyptic number.

It is an amenable number.

61326437 is a deficient number, since it is larger than the sum of its proper divisors (1).

61326437 is an equidigital number, since it uses as much as digits as its factorization.

61326437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 32.

The square root of 61326437 is about 7831.1197794441. The cubic root of 61326437 is about 394.3506652472.

The spelling of 61326437 in words is "sixty-one million, three hundred twenty-six thousand, four hundred thirty-seven".