1514001991 has 2 divisors, whose sum is σ = 1514001992. Its totient is φ = 1514001990.

The previous prime is 1514001989. The next prime is 1514002003. The reversal of 1514001991 is 1991004151.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1514001991 - 2¹ = 1514001989 is a prime.

Together with 1514001989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1514001961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 757000995 + 757000996.

It is an arithmetic number, because the mean of its divisors is an integer number (757000996).

Almost surely, 2^1514001991 is an apocalyptic number.

1514001991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1514001991 is an equidigital number, since it uses as much as digits as its factorization.

1514001991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 31.

The square root of 1514001991 is about 38910.1785012611. The cubic root of 1514001991 is about 1148.2650564895.

The spelling of 1514001991 in words is "one billion, five hundred fourteen million, one thousand, nine hundred ninety-one".