1151630993 has 2 divisors, whose sum is σ = 1151630994. Its totient is φ = 1151630992.

The previous prime is 1151630981. The next prime is 1151631007. The reversal of 1151630993 is 3990361511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1074331729 + 77299264 = 32777^2 + 8792^2 .

It is an emirp because it is prime and its reverse (3990361511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1151630993 - 2⁶ = 1151630929 is a prime.

It is not a weakly prime, because it can be changed into another prime (1151630903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575815496 + 575815497.

It is an arithmetic number, because the mean of its divisors is an integer number (575815497).

Almost surely, 2^1151630993 is an apocalyptic number.

It is an amenable number.

1151630993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151630993 is an equidigital number, since it uses as much as digits as its factorization.

1151630993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21870, while the sum is 38.

The square root of 1151630993 is about 33935.6890750726. The cubic root of 1151630993 is about 1048.1846161101.

The spelling of 1151630993 in words is "one billion, one hundred fifty-one million, six hundred thirty thousand, nine hundred ninety-three".