74782987 has 2 divisors, whose sum is σ = 74782988. Its totient is φ = 74782986.

The previous prime is 74782963. The next prime is 74782991. The reversal of 74782987 is 78928747.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74782987 - 2¹⁵ = 74750219 is a prime.

It is not a weakly prime, because it can be changed into another prime (74582987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37391493 + 37391494.

It is an arithmetic number, because the mean of its divisors is an integer number (37391494).

Almost surely, 2^74782987 is an apocalyptic number.

74782987 is a deficient number, since it is larger than the sum of its proper divisors (1).

74782987 is an equidigital number, since it uses as much as digits as its factorization.

74782987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1580544, while the sum is 52.

The square root of 74782987 is about 8647.7157099433. The cubic root of 74782987 is about 421.3091933713.

Subtracting 74782987 from its reverse (78928747), we obtain a triangular number (4145760 = T₂₈₇₉).

The spelling of 74782987 in words is "seventy-four million, seven hundred eighty-two thousand, nine hundred eighty-seven".