1994670731 has 2 divisors, whose sum is σ = 1994670732. Its totient is φ = 1994670730.

The previous prime is 1994670697. The next prime is 1994670739. The reversal of 1994670731 is 1370764991.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1994670731 is a prime.

It is a super-2 number, since 2×1994670731² = 7957422650216148722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1994670739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997335365 + 997335366.

It is an arithmetic number, because the mean of its divisors is an integer number (997335366).

Almost surely, 2^1994670731 is an apocalyptic number.

1994670731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994670731 is an equidigital number, since it uses as much as digits as its factorization.

1994670731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 1994670731 is about 44661.7367664985. The cubic root of 1994670731 is about 1258.8009780787.

The spelling of 1994670731 in words is "one billion, nine hundred ninety-four million, six hundred seventy thousand, seven hundred thirty-one".