74791487 has 2 divisors, whose sum is σ = 74791488. Its totient is φ = 74791486.

The previous prime is 74791477. The next prime is 74791511. The reversal of 74791487 is 78419747.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74791487 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74791447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37395743 + 37395744.

It is an arithmetic number, because the mean of its divisors is an integer number (37395744).

Almost surely, 2^74791487 is an apocalyptic number.

74791487 is a deficient number, since it is larger than the sum of its proper divisors (1).

74791487 is an equidigital number, since it uses as much as digits as its factorization.

74791487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 395136, while the sum is 47.

The square root of 74791487 is about 8648.2071552432. The cubic root of 74791487 is about 421.3251550787.

The spelling of 74791487 in words is "seventy-four million, seven hundred ninety-one thousand, four hundred eighty-seven".