7397006921 has 4 divisors (see below), whose sum is σ = 7490640000. Its totient is φ = 7303373844.

The previous prime is 7397006879. The next prime is 7397006927. The reversal of 7397006921 is 1296007937.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 7397006921 - 2¹⁴ = 7396990537 is a prime.

It is a super-2 number, since 2×7397006921² (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 (7397006927) 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, 46816421 + ... + 46816578.

It is an arithmetic number, because the mean of its divisors is an integer number (1872660000).

Almost surely, 2^7397006921 is an apocalyptic number.

It is an amenable number.

7397006921 is a deficient number, since it is larger than the sum of its proper divisors (93633079).

7397006921 is an equidigital number, since it uses as much as digits as its factorization.

7397006921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93633078.

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 7397006921 is about 86005.8539926208. The cubic root of 7397006921 is about 1948.4323952796.

The spelling of 7397006921 in words is "seven billion, three hundred ninety-seven million, six thousand, nine hundred twenty-one".