1961493237 has 24 divisors (see below), whose sum is σ = 3094111488. Its totient is φ = 1187524800.

The previous prime is 1961493227. The next prime is 1961493239. The reversal of 1961493237 is 7323941691.

1961493237 is a `hidden beast` number, since 1 + 9 + 614 + 9 + 3 + 23 + 7 = 666.

1961493237 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1961493237 - 2¹⁶ = 1961427701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1961493192 and 1961493201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961493239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88113 + ... + 108105.

It is an arithmetic number, because the mean of its divisors is an integer number (128921312).

Almost surely, 2^1961493237 is an apocalyptic number.

It is an amenable number.

1961493237 is a deficient number, since it is larger than the sum of its proper divisors (1132618251).

1961493237 is a wasteful number, since it uses less digits than its factorization.

1961493237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21001 (or 20998 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 1961493237 is about 44288.7484244023. The cubic root of 1961493237 is about 1251.7826803254.

The spelling of 1961493237 in words is "one billion, nine hundred sixty-one million, four hundred ninety-three thousand, two hundred thirty-seven".