61991702 has 4 divisors (see below), whose sum is σ = 92987556. Its totient is φ = 30995850.

The previous prime is 61991669. The next prime is 61991719. The reversal of 61991702 is 20719916.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×61991702² = 7685942233713608, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15497924 + ... + 15497927.

It is an arithmetic number, because the mean of its divisors is an integer number (23246889).

Almost surely, 2^61991702 is an apocalyptic number.

61991702 is a deficient number, since it is larger than the sum of its proper divisors (30995854).

61991702 is a wasteful number, since it uses less digits than its factorization.

61991702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30995853.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 61991702 is about 7873.4809328530. The cubic root of 61991702 is about 395.7715028767.

The spelling of 61991702 in words is "sixty-one million, nine hundred ninety-one thousand, seven hundred two".