7420321961 has 16 divisors (see below), whose sum is σ = 8213118144. Its totient is φ = 6660650304.

The previous prime is 7420321957. The next prime is 7420321963. The reversal of 7420321961 is 1691230247.

It is a cyclic number.

It is not a de Polignac number, because 7420321961 - 2² = 7420321957 is a prime.

It is a super-2 number, since 2×7420321961² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7420321963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97655 + ... + 156131.

It is an arithmetic number, because the mean of its divisors is an integer number (513319884).

Almost surely, 2^7420321961 is an apocalyptic number.

It is an amenable number.

7420321961 is a deficient number, since it is larger than the sum of its proper divisors (792796183).

7420321961 is a wasteful number, since it uses less digits than its factorization.

7420321961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58760.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 7420321961 is about 86141.2906857101. The cubic root of 7420321961 is about 1950.4773725853.

The spelling of 7420321961 in words is "seven billion, four hundred twenty million, three hundred twenty-one thousand, nine hundred sixty-one".