1901291537 has 2 divisors, whose sum is σ = 1901291538. Its totient is φ = 1901291536.

The previous prime is 1901291531. The next prime is 1901291549. The reversal of 1901291537 is 7351921091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1708664896 + 192626641 = 41336^2 + 13879^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1901291537 is a prime.

It is a super-2 number, since 2×1901291537² = 7229819017335644738, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1901291537.

It is not a weakly prime, because it can be changed into another prime (1901291531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950645768 + 950645769.

It is an arithmetic number, because the mean of its divisors is an integer number (950645769).

Almost surely, 2^1901291537 is an apocalyptic number.

It is an amenable number.

1901291537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1901291537 is an equidigital number, since it uses as much as digits as its factorization.

1901291537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 1901291537 is about 43603.8018640577. The cubic root of 1901291537 is about 1238.8429062539.

The spelling of 1901291537 in words is "one billion, nine hundred one million, two hundred ninety-one thousand, five hundred thirty-seven".