1974787231 has 2 divisors, whose sum is σ = 1974787232. Its totient is φ = 1974787230.

The previous prime is 1974787163. The next prime is 1974787247. The reversal of 1974787231 is 1327874791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1974787231 - 2⁹ = 1974786719 is a prime.

It is a super-2 number, since 2×1974787231² = 7799569215441294722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1974785231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987393615 + 987393616.

It is an arithmetic number, because the mean of its divisors is an integer number (987393616).

Almost surely, 2^1974787231 is an apocalyptic number.

1974787231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1974787231 is an equidigital number, since it uses as much as digits as its factorization.

1974787231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 592704, while the sum is 49.

The square root of 1974787231 is about 44438.5781838258. The cubic root of 1974787231 is about 1254.6042954938.

The spelling of 1974787231 in words is "one billion, nine hundred seventy-four million, seven hundred eighty-seven thousand, two hundred thirty-one".