1155889951 has 2 divisors, whose sum is σ = 1155889952. Its totient is φ = 1155889950.

The previous prime is 1155889939. The next prime is 1155889967. The reversal of 1155889951 is 1599885511.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1155889951 - 2⁵ = 1155889919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155889921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577944975 + 577944976.

It is an arithmetic number, because the mean of its divisors is an integer number (577944976).

Almost surely, 2^1155889951 is an apocalyptic number.

1155889951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155889951 is an equidigital number, since it uses as much as digits as its factorization.

1155889951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648000, while the sum is 52.

The square root of 1155889951 is about 33998.3815938347. The cubic root of 1155889951 is about 1049.4751575047.

The spelling of 1155889951 in words is "one billion, one hundred fifty-five million, eight hundred eighty-nine thousand, nine hundred fifty-one".