61961437 has 2 divisors, whose sum is σ = 61961438. Its totient is φ = 61961436.

The previous prime is 61961423. The next prime is 61961441. The reversal of 61961437 is 73416916.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53787556 + 8173881 = 7334^2 + 2859^2 .

It is a cyclic number.

It is not a de Polignac number, because 61961437 - 2¹⁹ = 61437149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61961396 and 61961405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61961407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30980718 + 30980719.

It is an arithmetic number, because the mean of its divisors is an integer number (30980719).

Almost surely, 2^61961437 is an apocalyptic number.

It is an amenable number.

61961437 is a deficient number, since it is larger than the sum of its proper divisors (1).

61961437 is an equidigital number, since it uses as much as digits as its factorization.

61961437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 37.

The square root of 61961437 is about 7871.5587401734. The cubic root of 61961437 is about 395.7070857911.

The spelling of 61961437 in words is "sixty-one million, nine hundred sixty-one thousand, four hundred thirty-seven".