1975001491 has 2 divisors, whose sum is σ = 1975001492. Its totient is φ = 1975001490.

The previous prime is 1975001477. The next prime is 1975001519. The reversal of 1975001491 is 1941005791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1975001491 - 2¹³ = 1974993299 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1975001491.

It is not a weakly prime, because it can be changed into another prime (1975001291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987500745 + 987500746.

It is an arithmetic number, because the mean of its divisors is an integer number (987500746).

Almost surely, 2^1975001491 is an apocalyptic number.

1975001491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1975001491 is an equidigital number, since it uses as much as digits as its factorization.

1975001491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 37.

The square root of 1975001491 is about 44440.9888616354. The cubic root of 1975001491 is about 1254.6496677734.

The spelling of 1975001491 in words is "one billion, nine hundred seventy-five million, one thousand, four hundred ninety-one".