61790587 has 2 divisors, whose sum is σ = 61790588. Its totient is φ = 61790586.

The previous prime is 61790579. The next prime is 61790593. The reversal of 61790587 is 78509716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61790587 - 2³ = 61790579 is a prime.

It is not a weakly prime, because it can be changed into another prime (61790537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30895293 + 30895294.

It is an arithmetic number, because the mean of its divisors is an integer number (30895294).

Almost surely, 2^61790587 is an apocalyptic number.

61790587 is a deficient number, since it is larger than the sum of its proper divisors (1).

61790587 is an equidigital number, since it uses as much as digits as its factorization.

61790587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 61790587 is about 7860.6988875036. The cubic root of 61790587 is about 395.3430486695.

It can be divided in two parts, 617 and 90587, that added together give a square (91204 = 302²).

The spelling of 61790587 in words is "sixty-one million, seven hundred ninety thousand, five hundred eighty-seven".