1611058997 has 8 divisors (see below), whose sum is σ = 1646148096. Its totient is φ = 1576003792.

The previous prime is 1611058993. The next prime is 1611059003. The reversal of 1611058997 is 7998501161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1611058997 - 2² = 1611058993 is a prime.

It is a super-2 number, since 2×1611058997² = 5191022183629292018, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611058991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103508 + ... + 118050.

It is an arithmetic number, because the mean of its divisors is an integer number (205768512).

Almost surely, 2^1611058997 is an apocalyptic number.

It is an amenable number.

1611058997 is a deficient number, since it is larger than the sum of its proper divisors (35089099).

1611058997 is a wasteful number, since it uses less digits than its factorization.

1611058997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16947.

The product of its (nonzero) digits is 136080, while the sum is 47.

The square root of 1611058997 is about 40137.9994145199. Note that the first 3 decimals coincide. The cubic root of 1611058997 is about 1172.2956357660.

Adding to 1611058997 its sum of digits (47), we get a square (1611059044 = 40138²).

The spelling of 1611058997 in words is "one billion, six hundred eleven million, fifty-eight thousand, nine hundred ninety-seven".