7928497901 has 4 divisors (see below), whose sum is σ = 7928678400. Its totient is φ = 7928317404.

The previous prime is 7928497883. The next prime is 7928497919. The reversal of 7928497901 is 1097948297.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1097948297 = 31 ⋅35417687.

It is an interprime number because it is at equal distance from previous prime (7928497883) and next prime (7928497919).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7928497901 is a prime.

It is a super-2 number, since 2×7928497901² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7928497921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23060 + ... + 128018.

It is an arithmetic number, because the mean of its divisors is an integer number (1982169600).

Almost surely, 2^7928497901 is an apocalyptic number.

It is an amenable number.

7928497901 is a deficient number, since it is larger than the sum of its proper divisors (180499).

7928497901 is a wasteful number, since it uses less digits than its factorization.

7928497901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180498.

The product of its (nonzero) digits is 2286144, while the sum is 56.

The square root of 7928497901 is about 89042.1130757800. The cubic root of 7928497901 is about 1994.0236511653.

The spelling of 7928497901 in words is "seven billion, nine hundred twenty-eight million, four hundred ninety-seven thousand, nine hundred one".