1137421861 has 2 divisors, whose sum is σ = 1137421862. Its totient is φ = 1137421860.

The previous prime is 1137421841. The next prime is 1137421933. The reversal of 1137421861 is 1681247311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 651219361 + 486202500 = 25519^2 + 22050^2 .

It is a cyclic number.

It is not a de Polignac number, because 1137421861 - 2²¹ = 1135324709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1137421841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 568710930 + 568710931.

It is an arithmetic number, because the mean of its divisors is an integer number (568710931).

Almost surely, 2^1137421861 is an apocalyptic number.

It is an amenable number.

1137421861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1137421861 is an equidigital number, since it uses as much as digits as its factorization.

1137421861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 34.

The square root of 1137421861 is about 33725.6854785785. The cubic root of 1137421861 is about 1043.8558361561.

The spelling of 1137421861 in words is "one billion, one hundred thirty-seven million, four hundred twenty-one thousand, eight hundred sixty-one".