1961153237 has 2 divisors, whose sum is σ = 1961153238. Its totient is φ = 1961153236.

The previous prime is 1961153221. The next prime is 1961153297. The reversal of 1961153237 is 7323511691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1857092836 + 104060401 = 43094^2 + 10201^2 .

It is a cyclic number.

It is not a de Polignac number, because 1961153237 - 2⁴ = 1961153221 is a prime.

It is a super-2 number, since 2×1961153237² = 7692244037991156338, 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 1961153237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1961153297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980576618 + 980576619.

It is an arithmetic number, because the mean of its divisors is an integer number (980576619).

Almost surely, 2^1961153237 is an apocalyptic number.

It is an amenable number.

1961153237 is a deficient number, since it is larger than the sum of its proper divisors (1).

1961153237 is an equidigital number, since it uses as much as digits as its factorization.

1961153237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 38.

The square root of 1961153237 is about 44284.9098113567. The cubic root of 1961153237 is about 1251.7103492570.

The spelling of 1961153237 in words is "one billion, nine hundred sixty-one million, one hundred fifty-three thousand, two hundred thirty-seven".