7061991 has 8 divisors (see below), whose sum is σ = 9429360. Its totient is φ = 4701312.

The previous prime is 7061983. The next prime is 7062007. The reversal of 7061991 is 1991607.

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

It is not a de Polignac number, because 7061991 - 2³ = 7061983 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7061941) 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, 1861 + ... + 4193.

It is an arithmetic number, because the mean of its divisors is an integer number (1178670).

Almost surely, 2^7061991 is an apocalyptic number.

7061991 is a deficient number, since it is larger than the sum of its proper divisors (2367369).

7061991 is a wasteful number, since it uses less digits than its factorization.

7061991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3345.

The product of its (nonzero) digits is 3402, while the sum is 33.

The square root of 7061991 is about 2657.4406860737. The cubic root of 7061991 is about 191.8561476737.

The spelling of 7061991 in words is "seven million, sixty-one thousand, nine hundred ninety-one".