61372609 has 2 divisors, whose sum is σ = 61372610. Its totient is φ = 61372608.

The previous prime is 61372541. The next prime is 61372631. The reversal of 61372609 is 90627316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58186384 + 3186225 = 7628^2 + 1785^2 .

It is a cyclic number.

It is not a de Polignac number, because 61372609 - 2¹³ = 61364417 is a prime.

It is not a weakly prime, because it can be changed into another prime (61372699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30686304 + 30686305.

It is an arithmetic number, because the mean of its divisors is an integer number (30686305).

Almost surely, 2^61372609 is an apocalyptic number.

It is an amenable number.

61372609 is a deficient number, since it is larger than the sum of its proper divisors (1).

61372609 is an equidigital number, since it uses as much as digits as its factorization.

61372609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 61372609 is about 7834.0672067579. The cubic root of 61372609 is about 394.4496078468.

The spelling of 61372609 in words is "sixty-one million, three hundred seventy-two thousand, six hundred nine".