1061621149 has 2 divisors, whose sum is σ = 1061621150. Its totient is φ = 1061621148.

The previous prime is 1061621123. The next prime is 1061621153. The reversal of 1061621149 is 9411261601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 862303225 + 199317924 = 29365^2 + 14118^2 .

It is a cyclic number.

It is not a de Polignac number, because 1061621149 - 2¹¹ = 1061619101 is a prime.

It is a super-2 number, since 2×1061621149² = 2254078928008160402, 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 1061621149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1061621549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530810574 + 530810575.

It is an arithmetic number, because the mean of its divisors is an integer number (530810575).

Almost surely, 2^1061621149 is an apocalyptic number.

It is an amenable number.

1061621149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1061621149 is an equidigital number, since it uses as much as digits as its factorization.

1061621149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1061621149 is about 32582.5282782046. The cubic root of 1061621149 is about 1020.1323514661.

The spelling of 1061621149 in words is "one billion, sixty-one million, six hundred twenty-one thousand, one hundred forty-nine".